Traxxas TRX-4 Crawler Kit Manual

Traxxas TRX-4 Crawler Kit Manual
MODEL 82016-4
ASSEMBLY MANUAL
INTRODUCTION
Thank you for purchasing the all-new Traxxas TRX-4
unassembled kit. The design of the TRX-4 instantly
obsoletes the status quo with greatly expanded features
and versatility. The TRX-4 features the powerful Titan® 21T
550 motor, waterproof electronics, and a smooth XL-5 HV 3s
LiPo-capable electronic speed control. The game-changing
portal axles provide greater ground clearance while the
rigid steel frame eliminates chassis flex and allows you to
navigate tough terrain. The new Canyon Trail 1.9 tires feature
tuned foam inserts to deliver superior bite on rocky surfaces
with convincing scale realism. In other words, we built it the
Traxxas way -- rugged, powerful, and ready to handle the
rigors of remote locations and all-day driving fun!
This manual details the assembly of the TRX-4. This manual
will also acquaint you with the model’s many different
components and its mechanical operation. Read through
the manual and examine the model carefully before
opening any of the parts bags included in the kit. If for some
reason you think the model is not what you wanted, then
do not continue any further. Your hobby dealer absolutely
cannot accept a model for return or exchange which has
been run or contains open bags. Please read the separate
Owner’s Manual before attempting to drive your new
model. You can download the Owner’s Manual for the
TRX-4, as well as the manuals for all Traxxas vehicles, at
Traxxas.com.
If you have any questions about your TRX-4, call Traxxas’
technical support department at 1-888-TRAXXAS (1-888872-9927) (U.S. residents only). Outside the U.S., call +1-972549-3000). Technical support is available Monday through
Friday, from 8:30am to 9:00pm central time. Technical
assistance is also available at Traxxas.com/support or via
e-mail at support@Traxxas.com.
Join thousands of registered members in our online
community at Traxxas.com. Traxxas offers a full-service,
on-site repair facility to handle any of your Traxxas service
needs. Maintenance and replacement parts may be
purchased directly from Traxxas by phone or online at
Traxxas.com. You can save time, along with shipping and
handling costs, by purchasing replacement parts from your
local dealer. Do not hesitate to contact us with any of your
product support needs. We want you to be thoroughly
satisfied with your new model!
ASSEMBLY HINTS
To assemble this kit, you’ll need a large flat working area
where you will have plenty of room to build. Be sure it’s a
place where you can leave your work spread out and not in
the way when you want to take a break from the assembly.
Allow yourself plenty of time to build this kit; assembly
time is going to vary with each individual. Experienced
2 • TRAXXAS TRX-4
builders may only need 4-5 hours to assemble this kit, while
others may spend an entire weekend on it. You should
feel comfortable with taking as much time as needed to
properly build and set up your model.
If you’ve been exploring the contents of your kit box, you’ve
noticed many bags of small parts. Open only one bag at a
time. To keep the parts organized, use small paper plates
or several large plastic plates with partitions to contain the
parts. Label the paper plates, and then pour the contents
of the bags onto them. This puts the parts out in the open
where you can find them easily. The plates also prevent
small parts from rolling off the table.
Please read the text next to each diagram. The text contains
important information, such as assembly steps, screw
sizes, and part numbers. Also, pay attention to any notes
that may follow some steps. Before you attempt to run
your newly-built model, please read all of the instructions
and precautions included in the Owner’s Manual. You can
download the Owner’s Manual for the TRX-4, as well as the
manuals for all Traxxas vehicles, at Traxxas.com.
Remember, as you assemble your Traxxas model, you are not
alone. If you have any questions or run into difficulties, call
Traxxas’ technical support department at 1-888-TRAXXAS
(1-888-872-9927) (U.S. residents only). Outside the U.S., call
+1-972-549-3000). Technical support is available Monday
through Friday, from 8:30am to 9:00pm central time.
ITEMS YOU WILL NEED
Some of the tools that you may need in the maintenance
and repair of your model have been provided. These include:
• 2.0mm “T” wrench
• 2.5mm “L” wrench
• 4-way wrench
• High Performance Grease
• Silicone Shock Oil
Required but not included:
• Traxxas Ultra Premium Tire Glue, Part #6468 (CA glue)
• 4 AA alkaline batteries
• 6 or 7-cell NiMH battery pack, 2s or 3s LiPo battery pack,
with Traxxas High-Current connector
• Battery charger
• Safety glasses
• Needle nose pliers
The following items are not required for the operation
of your model, but are a good idea to include in any RC
toolbox:
• Metric hex driver set (Highly recommended for kit assembly)
• Hobby knife
• Side cutters
These items can be purchased from your hobby dealer.
INTRODUCTION
RADIO SYSTEM INSTRUCTIONS
The Traxxas TQi 2.4GHz radio system is provided with your unassembled kit. Complete instructions for operating the radio
system are included in the TRX-4 Owner’s Manual. You can download the Owner’s Manual for the TRX-4, as well as the
manuals for all Traxxas vehicles, at Traxxas.com.
WARRANTY STATEMENT
Every effort has been made in component design and material selection to make your model as durable as possible
and still maintain a weight consistent with good handling. Because this model is intended for operation under severe
conditions, no warranties are expressed nor implied relating to the longevity of the parts. If you find that a part has a
defect in materials or workmanship, please return it to us BEFORE IT IS USED, and we will gladly replace it. Damage caused
by excessive force, abuse, neglect or failure to adhere to the precautions outlined in the literature contained with your
model will void the warranty.
HARDWARE DESCRIPTIONS
The following chart is provided to help you identify the many different sizes and types of hardware that are used in the
assembly of this model. Note the difference between the length measurements of the roundhead and countersunk
screws. A ruler is provided at the bottom of each page to measure the length of the screws in millimeters.
3x12mm Countersunk Screw
3x12mm Buttonhead Screw
3mm
12mm
5x10x4mm Ball Bearing
3mm
10mm
5mm
12mm
4mm
CCS
Countersunk Cap Screw
GS
CS
Cap Screw
PTW PTFE Washer
FCS
Flathead Cap Screw
MW
Metal Washer
BCS
Buttonhead Cap Screw
E
E-Clip
NL
Nylon Locknut
BB
Ball Bearing
Set (Grub) Screw
ICON DESCRIPTIONS
There are icons in this assembly instruction which indicate certain actions needed during assembly.
Grease Tube
Apply included
grease to part
indicated.
Turn Icon
Indicates assembly
needs to be flipped
or turned around.
Oil Bottle
Use included
silicone shock oil.
Optional Part Icon
Optional part available.
Refer to included
parts list.
Aluminum Part Icon
Aluminum accessory
part available. Refer to
included parts list.
White: Silicone
Dark: High Performance
x2
x4
Repeat Icon
Repeat step the number
of times indicated.
TRAXXAS TRX-4 • 3
A. TRANSMISSION ASSEMBLY
TRANSMISSION BAG
A1. Insert 5x11x4mm bearings into transmission case halves
Transmission Case Halves (2)
5x11x4mm BB (5)
Note: Bearing Seating
Press down hard to ensure
bearings are fully seated.
3
7
7
Bearing installs on the
outside of case half
Side view
Side view
TRANSMISSION BAG
A2. Assemble input shaft
Input Shaft
2x9.8 Pin (2)
18T Input Gear
18T Input Gear
30T Input Gear
30T Input Gear
Apply drop
of grease
TOOLS BAG
High Performance Grease
4 • TRAXXAS TRX-4
A. TRANSMISSION ASSEMBLY
TRANSMISSION BAG
A3. Assemble output shaft
Output Shaft
24T Output Gear
24T output gear and drive hub assembly
5x8x2.5mm BB
36T output gear assembly
5x8x2.5mm BB
Drive Hub
Side view assembled
36T Output Gear
5x8x2.5mm BB
5x10x4mm BB
Shift dog assembly
5x8x2.5mm BB (3)
5x10x4mm BB
Shift Dog
TOOLS BAG
High Performance Grease
Holes face
shift dog
Apply drop
of grease
ACCESSORY
Option Part
8296 Single Speed
Conversion
TRAXXAS TRX-4 • 5
A. TRANSMISSION ASSEMBLY
TRANSMISSION BAG
Shift Fork
A4. Install input and output assemblies into main transmission housing
1 Place washers on output assembly
5x8x0.5mm PTFE Washer (2)
5x8x0.5mm
PTFE Washer
3 Place assemblies into transmission case halves
2.5x8mm CS (5)
5x8x0.5mm
PTFE Washer
Input Gear
Assembly
2 Place shift fork into shift dog recess
24T Output
Gear and
Drive Hub
Assembly
Shift Fork
4 Secure transmission case halves together
2.5x8mm CS
2.5x8mm CS
6 • TRAXXAS TRX-4
Align the shift fork with the pin molded in
the transmission case half.
A. TRANSMISSION ASSEMBLY
TRANSMISSION BAG
A5. Install bearings into the transfer case
Transfer Case Cover
5x11x4mm BB (5)
Note: Bearing Seating
Press down hard to ensure
bearings are fully seated.
3
7
7
TRANSMISSION BAG
Long Transfer Case
Output Shaft
A6. Assemble and install transfer case gears
1
2 Short output shaft assembly
27T transfer case gear assembly
Short Transfer Case
Output Shaft
2x9.8 Pin (3)
Apply drop
of grease
27T Transfer Case Gear (3)
Insert pin
Apply drop
of grease
Apply drop
of grease
5x8x0.5mm PTFE Washer (2)
TOOLS BAG
5x8x0.5mm
PTFE Washer
High Performance Grease
5x8x0.5mm
PTFE Washer
3 Long output shaft assembly
TRAXXAS TRX-4 • 7
A. TRANSMISSION ASSEMBLY
TRANSMISSION BAG
A7. Assemble transfer case
Transfer Case Cover
2.5x8mm CS (3)
2.5x8mm CS
Once assembled, turn input shaft.
The gears should spin freely with no binding.
TRANSMISSION BAG
A8. Install slipper clutch and spur gear
45T Spur Gear
Locknut
4x8 Metal Washer
Spring Washer
Spring washer
orientation
Slipper Plate
Remove friction
material backing and
apply to spur gear
Slipper Friction Material
2.0mm
Hex Wrench
To tighten the slipper nut, insert the 2.0mm hex wrench into the hole
in the end of the input shaft. This locks the shaft for adjustments.
Turn the adjustment nut until all four spring washers are flat; then,
tighten the nut an additional 1/16 turn (or until the slipper clutch
does not allow the spur gear to slip during normal operation).
7
ACCESSORY
Option Part
8249 Slipper Eliminator
8 • TRAXXAS TRX-4
4-Way
Wrench
3
A. TRANSMISSION ASSEMBLY
TRANSMISSION BAG
A9. Install shift linkage and high/low shift servo
Transmission Servo Mount
2065 Hi/Low shift servo
Shift Linkage
3x8mm BCS (4)
ELECTRONICS BAG
3x8mm
BCS
2065 Servo Assembly
Note: Servo horn
is pre-installed and
factory-centered. Do
not turn servo shaft
by hand or you could
damage the servo.
3x8mm
BCS
It is okay to slightly rock
NO!
horn to align ball cup.
Do not turn servo shaft
by hand or you could
damage the servo.
SAFE
NO!
Completed transmission assembly
TRAXXAS TRX-4 • 9
B. DIFFERENTIAL ASSEMBLY
DIFFERENTIAL BAG
B1. Install long output and spider gears into differential carrier
Differential Carrier
Spider gear assembly
Spider Gear (4)
Diff. Output
Gear (Long)
Crosspin (2)
Crosspin
Diff. Output Gear (Long)
Differential
Carrier
x2
DIFFERENTIAL BAG
Ring Gear
4
B2. Install ring gear assembly onto differential carrier
1
Apply a LARGE drop
of grease between
spider gears.
2
Diff. Output
Gear (Short)
Apply light
coating
Diff. Output Gear (Short)
2.5X8mm BCS (4)
TOOLS BAG
3
High Performance Grease
ACCESSORY
Option Part
8279R Machined Spiral
Cut Ring Gear Set
Option Part
8287 Overdrive Ring
Gear Set
Option Part
8288 Underdrive Ring
Gear Set
10 • TRAXXAS TRX-4
x2
2.5x8mm
BCS
B. DIFFERENTIAL ASSEMBLY
DIFFERENTIAL BAG
B3. Install locking slider and bearings onto differential carrier assembly
2.5x12mm Pin
2.5x12mm Pin
15x21x4mm BB
Locking Slider
7x14x5mm BB
Locking Slider
15x21x4mm BB
10x15x4mm BB
7x14x5mm BB
Pin will fit in slot
of locking slider.
Side view assembled
10x15x4mm BB
x2
Completed differential assemblies
ACCESSORY
Option Part
8297 Differential Spool
TRAXXAS TRX-4 • 11
C. REAR AXLE ASSEMBLY
REAR AXLE BAG
C1. Insert bearings, pinion gear and differential assembly into axle housing
Rear Axle Housing
Apply drop
of grease
Differential Assembly
11T Pinion Gear
6x13x5mm BB
Assembled
5x11x4mm BB
6x13x5mm BB
5x11x4mm BB
TOOLS BAG
High Performance Grease
Differential
assembly
Apply drop
of grease
ACCESSORY
Option Part
8297 Differential Spool
REAR AXLE BAG
Locking Cable
Locking Fork
12 • TRAXXAS TRX-4
C2. Assemble locking fork and locking cable
1
2
C. REAR AXLE ASSEMBLY
REAR AXLE BAG
C3. Install locking fork and locking cable
3mm E-Clip
1
Use needle nose pliers
to set E-clip between
locking cable and
axle housing.
2
Use needle nose pliers to press
E-clip onto locking cable.
C4. Verify locking fork installation
Move the end of the locking
cable in and out to verify the
locking fork moves back and
forth on its pivot.
TRAXXAS TRX-4 • 13
C. REAR AXLE ASSEMBLY
REAR AXLE BAG
C5. Install differential housing cover
Differential Housing Cover
2.5x16mm CS (4)
2.5x16mm
CS
ACCESSORY
Option Part
8280R Red
Differential Cover
2.5x16mm
CS
Option Part
8280X Chrome
Differential Cover
REAR AXLE BAG
C6. Install axle portal mounts to axle housing
Axle Portal Mounts (2)
2.5x10mm CCS (6)
2.5x10mm CCS
Note
Orientation
Note
Orientation
ACCESSORY
Aluminum Accessory
Portal Axle Adapter
14 • TRAXXAS TRX-4
2.5x10mm CCS
C. REAR AXLE ASSEMBLY
REAR AXLE BAG
C7. Insert bearings into portal housings
Outer Rear Portal Housing
4x10mm BB
Inner Rear Portal Housing
4x10x4mm BB
6x13x5mm BB
6x12x4mm BB
6x12x4mm BB
6x13x5mm BB
x2
REAR AXLE BAG
C8. Assemble and install portal input and output gears
2x12mm Pin
Portal output gear assembly
10x15x4mm BB
Apply drop
of grease
Portal Output Gear
2x12mm Pin
Portal Stub Axle
Portal input
gear assembly
Portal Input Gear
(Rear)
10x15x4mm BB
TOOLS BAG
High Performance Grease
Apply drop
of grease
ACCESSORY
Option Part
8065 Machined
Input Gear
Option Part
8063 Heavy
Duty Axle
Aluminum Accessory
Aluminum Portal
Housings
x2
TRAXXAS TRX-4 • 15
C. REAR AXLE ASSEMBLY
REAR AXLE BAG
2.5x10mm CS (8)
C9. Assemble portal housings
Assembled
2.5x10mm CS
2.5x10mm CS
REAR AXLE BAG
C10. Install axle driveshafts
2.5x16mm CS (4)
Right Axle Driveshaft
(Long)
Right Axle
Driveshaft
Left Axle
Driveshaft
Left Axle Driveshaft
(Short)
Right Axle
Driveshaft
2.5x16mm CS
Left Axle
Driveshaft
ACCESSORY
Option Part
8061 Heavy Duty
Rear Axles
16 • TRAXXAS TRX-4
2.5x16mm CS
C. REAR AXLE ASSEMBLY
REAR AXLE BAG
C11. Install link mounts and 12mm wheel hexes
3x10mm
Screw Pin
Left Link Mount
Right Link Mount
2.5x10mm CS (4)
Note
Threads
3x10mm Screw Pin (2)
12mm
Wheel Hex
12mm Wheel Hex (2)
2.5x10mm CS
Note
Orientation
ACCESSORY
Aluminum Accessory
Aluminum Wheel Hex
Aluminum Accessory
Aluminum Link Mounts
Note
Orientation
2.5x10mm CS
Completed rear axle assembly
Check your assembly carefully.
Straight on view
TRAXXAS TRX-4 • 17
D. FRONT AXLE ASSEMBLY
FRONT AXLE BAG
D1. Insert bearings, pinion gear and differential assembly into axle housing
Front Axle Housing
Apply drop
of grease
Differential Assembly
11T Pinion Gear
6x13x5mm BB
Assembled
5x11x4mm BB
6x13x5mm BB
5x11x4mm BB
TOOLS BAG
High Performance Grease
Apply drop
of grease
Differential
assembly
ACCESSORY
Option Part
8297 Differential Spool
FRONT AXLE BAG
Locking Cable
Locking Fork
18 • TRAXXAS TRX-4
D2. Assemble locking fork and locking cable
1
2
D. FRONT AXLE ASSEMBLY
FRONT AXLE BAG
D3. Install locking fork and locking cable
3mm E-Clip
1
Use needle nose pliers
to set E-clip between
locking cable and
axle housing.
2
Use needle nose pliers to press
E-clip onto locking cable.
D4. Verify locking fork installation
Move the end of the locking
cable in and out to verify the
locking fork moves back and
forth on its pivot.
TRAXXAS TRX-4 • 19
D. FRONT AXLE ASSEMBLY
FRONT AXLE BAG
D5. Install differential housing cover
Differential Housing Cover
2.5x16mm CS (4)
ACCESSORY
2.5x16mm
CS
Option Part
8280R Red
Differential Cover
Option Part
8280X Chrome
Differential Cover
FRONT AXLE BAG
2.5x16mm
CS
D6. Install caster blocks onto axle housing
Left Caster Block
2.5x10 CCS
Right Caster Block
2.5x10mm CCS (6)
Note
Orientation
2.5x10 CCS
ACCESSORY
Aluminum Accessory
Caster Blocks
FRONT AXLE BAG
Note
Orientation
D7. Insert bearings into portal housings
Inner Front Portal Housing
Outer Front Portal Housing
6x12x4mm BB
4x10x4mm BB
6x13x5mm BB
6x12x4mm BB
6x13x5mm BB
x2
20 • TRAXXAS TRX-4
4x10mm BB
D. FRONT AXLE ASSEMBLY
FRONT AXLE BAG
Front Left Driveshaft
D8. Assemble and install portal input and output gears
1
Left Driveshaft (Short)
Portal input gear assembly
Front Right Driveshaft
2x12mm Pin
2.5x4mm BCS (3)
Right Driveshaft (Long)
Portal
Input Gear
(Front)
2.5x10mm CS (8)
Front Driveshaft
2x12mm Pin (2)
12x18x4mm BB
CV Crosspin
CV Crosspin
12x18x4mm BB
2
Note Orientation!
Apply drop
of grease
Short drive shaft installs in
left portal housing
Portal Output Gear
Portal Stub Axle
2.5x4mm BCS
2.5x4mm BCS
Long drive shaft installs in
right portal housing
1
2
Portal output gear assembly
Apply drop
of grease
Portal Stub
Axle
Portal Input Gear
(Front)
Portal Output
Gear
2x12mm Pin
TOOLS BAG
High Performance Grease
Assemble portal housings
ACCESSORY
Assembled
2.5x10mm CS
Option Part
8064 Machined
Input Gear
Option Part
8060 Heavy Duty Axle
Aluminum Accessory
Aluminum Portal
Housings
x2
2.5x10mm CS
TRAXXAS TRX-4 • 21
D. FRONT AXLE ASSEMBLY
FRONT AXLE BAG
D9. Install portal/driveshaft assemblies to axle
3x12mm BCS (4)
Portal
Assembly
Kingpin Bushing (4)
Right Axle Driveshaft
(Long)
3x12mm BCS
Left Axle Driveshaft
(Short)
Left Axle
Driveshaft
(Short)
3x12mm BCS
Kingpin Bushing
Kingpin Bushing
Right Axle
Driveshaft
(Long)
3x12mm BCS
3x12mm BCS
FRONT AXLE BAG
Portal
Assembly
D10. Install link mounts and 12mm wheel hexes
Left Link Mount
3x10mm
Screw Pin
Right Link Mount
2.5x10mm CS (4)
Note
Threads
3x10mm Screw Pin (2)
12mm Wheel Hex (2)
12mm
Wheel Hex
Note
Orientation
2.5x10mm
CS
Note
Orientation
ACCESSORY
Aluminum Accessory
Aluminum Wheel Hex
Aluminum Accessory
Aluminum Link Mounts
22 • TRAXXAS TRX-4
2.5x10mm
CS
D. FRONT AXLE ASSEMBLY
FRONT AXLE BAG
D11. Install steering link to portal housings
3x15mm BCS
SUSPENSION LINK BAG
Drag Link
3x15mm BCS
Drag Link
ACCESSORY
Option Part
8274 Hollow Ball Set
Drag Link
92.18mm
133.18mm
Completed front axle assembly
Check your assembly carefully.
Straight on view
TRAXXAS TRX-4 • 23
E. CHASSIS ASSEMBLY
CHASSIS PLASTICS BAG E1. Assemble front bumper mount crossmember, steering servo mount, and front fender to right chassis rail
Right Chassis Rail
Steering Servo Mount
Front Bumper
Mount Crossmember
Steering Servo
Mount
Front Bumper
Mount Crossmember
Right Chassis Rail
Right Front Fender
Front View
3x10mm BCS (2)
3x12mm BCS (2)
Right Front
Fender
3x10mm BCS
3x12mm
BCS
ACCESSORY
Option Part
8216 Shock Towers
CHASSIS PLASTICS BAG E2. Assemble right floor pan and right front wire clip to right chassis rail
Right Chassis Floor Pan
Front Right
Wire Clip
Front Right Wire Clip
3x12mm BCS
Right Chassis
Floor Pan
24 • TRAXXAS TRX-4
Note Orientation
3x12mm BCS
E. CHASSIS ASSEMBLY
CHASSIS PLASTICS BAG E3. Assemble front lower gear cover and center skidplate to chassis rail
Lower Gear Cover
Center Skidplate
Rear Right Wire Clip
1
2
Lower Gear
Cover
Center
Skidplate
Lower Gear
Cover
3
3x10mm BCS (2)
3x12mm BCS
3x10mm BCS
Top view
3x10mm BCS
Rear Right
Wire Clip
3x12mm
BCS
CHASSIS PLASTICS BAG E4. Assemble right rear fender, damper crossmember, and rear bumper crossmember to right chassis rail
Right Rear Fender
Damper Crossmember
Rear Bumper Crossmember
Rear Bumper
Crossmember
3x10mm BCS (4)
3x12mm BCS
3x10mm
BCS
Damper
Crossmember
3x10mm
BCS
3x12mm BCS
Right Rear
Fender
TRAXXAS TRX-4 • 25
E. CHASSIS ASSEMBLY
CHASSIS PLASTICS BAG E5. Assemble left chassis rail and left front fender to right chassis rail assembly
Left Chassis Rail
3x8mm
FCS
Left Front Fender
Front Battery Plate
3x10mm BCS (2)
3x10mm
BCS
3x12mm BCS (2)
Left Front
Fender
3x8mm FCS (4)
3x12mm
BCS
Left Chassis
Rail
ACCESSORY
Option Part
8216 Shock Towers
CHASSIS PLASTICS BAG E6. Assemble left floor pan, left rear and left front wire clip to left chassis rail
Left Chassis Floor Pan
Rear Left Wire Clip
Front Left Wire Clip
Front Left
Wire Clip
3x10mm BCS (2)
Rear Left
Wire Clip
3x10mm
BCS
3x12mm BCS (2)
3x10mm
BCS
3x12mm
BCS
3x12mm
BCS
26 • TRAXXAS TRX-4
E. CHASSIS ASSEMBLY
CHASSIS PLASTICS BAG E7. Assemble left rear fender to right chassis rail assembly and install rock light covers to fenders
Left Rear Fender
Rock Light Covers (8)
2.5x6mm CS (10)
2.5x6mm CS
Rock Light Cover
3x10mm BCS
3x10mm BCS (4)
3x10mm
BCS
x8
3x12mm BCS
2.5x6mm
CS
2.5x6mm
CS
3x12mm
BCS
2.5x6mm
CS
2.5x6mm
CS
ACCESSORY
Option Part
8026 Rock Light Kit
Completed chassis assembly
Check your assembly carefully.
TRAXXAS TRX-4 • 27
F. ELECTRONICS INSTALLATION
CHASSIS PLASTICS BAG F1. Install transmission assembly into chassis assembly
3x10mm BCS
Chassis Assembly
Transmission Assembly
3x10mm BCS (3)
Place servo wire into clip
before installing screws
3x10mm
BCS
ELECTRONICS BAG
Upper Gear Cover
Titan 550 Motor
F2. Install motor into chassis assembly
1
Pinion gear should be 1-1.5mm
from end of motor shaft
Motor Mount
Plate
Motor Mount Plate
3x8mm CS
11T Pinion Gear
3x8mm CS (2)
Titan 550
Motor
3x4 GS
A
B
C (Default)
D
E
F
G
H
2
3x8mm CS
4
3x8mm BCS (3)
3x4 GS
3x8mm BCS
3x8mm BCS
Screw Positions
Spur Gear
Pinion Gear
39
45
9
x
A
10
x
B
11
x
C
12
x
D
13
x
E
14
x
F
15
A
G
16
B
H
17
C
x
18
D
x
19
E
x
20
F
x
21
G
x
22
H
x
28 • TRAXXAS TRX-4
Upper Gear
Cover
3
Mesh gear teeth; then tighten set screw
F. ELECTRONICS INSTALLATION
CHASSIS
ELECTRONICS
PLASTICS
BAG
BAG F3. Install lower receiver box onto chassis assembly
Lower Receiver Box
TQi 2.4GHz Receiver
Receiver
Foam Tape
Receiver Foam Tape
3x6mm BCS (2)
Place on smooth surface portion (note orientation)
3x6mm
BCS
3x6mm
BCS
Front of
model
ELECTRONICS
BAG
CHASSIS
PLASTICS
BAG F4. Install steering servo onto chassis assembly
2075 Servo
3x10mm FCS (4)
3x10mm FCS
Note Orientation:
Servo wires exit on
left side
ELECTRONICS
BAGBAG F5. Install ESC onto chassis assembly
CHASSIS
PLASTICS
XL-5 HV Electronic
Speed Control (ESC)
Clip wires into retainers on servo mount
and chassis rail toward receiver box
3x12mm BCS
Place ESC wire under screw
boss before installing screws
3x12mm BCS (2)
Plug bullet connectors from motor into ESC
TRAXXAS TRX-4 • 29
F. ELECTRONICS INSTALLATION
ELECTRONICS BAG
Chassis T-Lock Servo Mount
2065 Servo (2)
F6. Install T-Lock servos onto chassis
1
3x8mm
BCS
3x8mm
BCS
3
Route wires
from the ESC
and the shift servo
through the top
loop of the T-Lock
servo mount before
installing the mount
on the chassis.
3x8mm BCS (6)
4
Chassis T-Lock Servo Mount
3x8mm
BCS
Note servo arm orientation. Ball cup mounts should be
on the same side as the top loop of servo mount.
2
Note wire routing
ELECTRONICS BAG
F7. Install receiver bottom foam
F8. Install antenna from receiver on right floor pan
Receiver Box Foam Seal
Antenna Tube
Antenna Cap
Antenna Cap
2 3x4mm GS
3x4mm GS
1 Antenna Tube
30 • TRAXXAS TRX-4
F. ELECTRONICS INSTALLATION
ELECTRONICS BAG
F9. Install wires into receiver box
Correct wire routing
Zip Tie
Bundle excess wires in receiver box
ELECTRONICS BAG
2.5x8mm CS (2)
BATT/CH5
Rear T-Lock Servo
CH4
Front T-Lock Servo
CH3
Shift Servo
CH2
Electronic Speed Control
CH1
Steering Servo
Caution! Pinch
point for wires.
F10. Waterproof and seal the receiver box
1
3x8mm BCS (3)
Receiver Clamp
Foam Seal
Receiver Wire
Clamp
Receiver Box Cover
Receiver Box Plug
Receiver Box
Plug
3x8mm
BCS
3x8mm
BCS
Receiver Box
Cover
2.5x8mm CS
O-Ring Seal
Receiver Wire Clamp
Receiver Clamp Foam Seal
Silicone Grease
2
Apply small
bead of grease
Apply light
coating
O-Ring
Seal
TRAXXAS TRX-4 • 31
F. ELECTRONICS INSTALLATION
CHASSIS PLASTICS BAG F11. Assemble and install battery tray
Battery Tray
3x10mm
CCS
Battery Hold-down
Pivot Post
3x10mm BCS (2)
3x12mm BCS (2)
Pivot Post Screw
Battery
Clip
Battery
Hold-down
Battery Clip
Pivot
Post
3x12mm
BCS
Screw
Pin
Battery Hold-down Screw Pin
Battery
Tray
3x10mm CCS (2)
ELECTRONICS BAG
Steering Servo Horn
3x6mm BCS
Pivot Post Screw
F12. Center the steering servo
1
2
3
ACCESSORY
ACCESSORY
Option Part
The front tray can be used
to hold small Traxxas
batteries to shift weight
over the front axle.
2925X NiMH
2820X 2S LiPo
2823X 3S LiPo
Use hook and loop strap
8222 to secure.
32 • TRAXXAS TRX-4
3x6mm
BCS
Plug battery into ESC
(see Quick Start)
Steering
Servo Horn
4
Turn on the model
(see Quick Start)
5
3x12mm
BCS
F13. Install servo horn on steering servo
Turn transmitter on
(see Quick Start)
Option Part
8247X Steel Servo Arm
3x10mm
BCS
Set Steering Trim
to Zero
Unplug battery and turn transmitter off
Completed assembly
Check your assembly carefully.
Note orientation - Servo horn will face straight ahead
G. SUSPENSION & DRIVELINE INSTALLATION
DAMPER BAG
x4
G1. Assemble GTS shocks
Shock Assemblies
Silicone Shock Oil
1
2
Front Shock Springs
Rear Shock Springs
Upper Spring Retainers
Unscrew
cap
Fill with
shock oil
3
4
5
Slowly move
piston to remove
excess air
6.7mm
(0.26")
Lower Spring Retainers
Note: Shaft
should be fully
compressed when
cap is installed.
Add oil to reach
the proper level
Exercise shock to make sure it compresses fully. If it does not, it is overfilled.
GTS Shock Exploded View
ACCESSORY
Option Part
8140 Long Arm Lift Kit
8140R Long Arm Lift Kit
8140X Long Arm Lift Kit
Option Part
8042 Springs (0.22)
8043 Springs (0.30)
8044 Springs (0.39)
8045 Springs (0.61)
Aluminum Accessory
8260A Shocks
(blue-anodized)
Shock Cap
Upper Spring
Retainer
Note: Install upper
spring retainer
before shock cap
Shock
Spring
Suggested Spring Preload Settings (May require fine tuning when body installed)
9mm
5mm
5mm
5mm
Right Front Shock
Assembled
Left Rear Shock
Assembled
Right Rear Shock
Assembled
Lower Spring
Retainer
8260G Shocks
(green-anodized)
8260R Shocks
(red-anodized)
8260X Shocks
(hard-anodized)
Left Front Shock
Assembled
TRAXXAS TRX-4 • 33
G. SUSPENSION & DRIVELINE INSTALLATION
SUSPENSION LINK BAG
G2. Attach front shocks and front lower suspension links to front axle assembly
3x27mm BCS (2)
Front Lower
Suspension Links
Left Front
Shock Assembly
3x27mm BCS
Front
Axle Assembly
Right Front
Shock Assembly
ACCESSORY
Option Part
8140 Long Arm Lift Kit
8140R Long Arm Lift Kit
8140X Long Arm Lift Kit
Option Part
8274 Hollow Ball Set
SUSPENSION LINK BAG
Front Lower
Suspension Links
3x27mm
BCS
75.78mm
Front Lower
Suspension Link
114.78mm
G3. Attach steering link, front panhard bar and front upper suspension link to front axle assembly
3x15mm BCS (2)
Front Upper
Suspension Link
3x23mm BCS
3x23mm BCS
Steering Link
Front Panhard Bar
Front Upper
Suspension Link
Steering Link
Front Upper Link
Steering Link
34.50mm
77.28mm
37.61mm
80.39mm
34 • TRAXXAS TRX-4
3x15mm
BCS
3x15mm
BCS
Front
Panhard Bar
Front Panhard Bar
37.61mm
77.61mm
G. SUSPENSION & DRIVELINE INSTALLATION
SUSPENSION LINK BAG
G4. Attach front axle assembly to chassis assembly
3x15mm BCS
(Steering Link)
3x15mm BCS (4)
3x23mm BCS (3)
3x15mm BCS
(Front Lower Link)
3x23mm BCS
(Front Upper Link)
3x23mm BCS
(Front Shock)
3x15mm BCS
(Front Lower Link)
Install front panhard bar to chassis
and steering link to steering servo
3x15mm BCS
(Steering Link)
3x23mm BCS
(Front Shock)
3x15mm BCS
(Front Panhard Bar)
3x15mm BCS
(Front Panhard Bar)
Install upper and lower suspension links to chassis
3x15mm BCS
(Front Lower Link)
Install front shocks to fenders from top of chassis
3x15mm BCS
(Front Lower Link)
3x23mm BCS
(Front Upper Link)
3x23mm BCS
(Front Shock)
3x23mm BCS
(Front Shock)
TRAXXAS TRX-4 • 35
G. SUSPENSION & DRIVELINE INSTALLATION
SUSPENSION LINK BAG
3x27mm BCS (2)
3x30mm BCS
G5. Attach rear shocks and rear suspension links to rear axle assembly
Right Rear
Shock Assembly
Left Rear
Shock Assembly
3x30mm BCS
(Rear Upper Links)
Rear Upper
Suspension Links
Rear Lower
Suspension Links
3x27mm BCS
(Shocks and Rear
Lower Link)
Rear Lower
Suspension Link
Rear Lower
Suspension Link
Rear Upper
Suspension Link
ACCESSORY
Option Part
8140 Long Arm Lift Kit
8140R Long Arm Lift Kit
8140X Long Arm Lift Kit
Option Part
8274 Hollow Ball Set
36 • TRAXXAS TRX-4
Rear Lower Link
Rear Upper
Suspension Link
84.50mm
123.50mm
Rear Upper Link
84.50mm
127.31mm
3x27mm BCS
(Shocks and Rear
Lower Link)
G. SUSPENSION & DRIVELINE INSTALLATION
SUSPENSION LINK BAG G6. Attach rear axle assembly to chassis assembly
3x15mm BCS (2)
3x23mm BCS (2)
3x25mm BCS (2)
3x15mm BCS
(Rear Lower Link)
3x25mm BCS
(Rear Upper Link)
3x23mm BCS
(Rear Shock)
3x15mm BCS
(Rear Lower Link)
3x25mm BCS
(Rear Upper Link)
3x23mm BCS
(Rear Shock)
Install upper and lower suspension links to chassis
Install rear shocks to fenders from top of chassis
3x23mm BCS
(Rear Shock)
3x25mm BCS
(Rear Upper Link)
3x25mm BCS
(Rear Upper Link)
3x15mm BCS
(Rear Lower Link)
3x15mm BCS
(Rear Lower Link)
3x23mm BCS
(Rear Shock)
TRAXXAS TRX-4 • 37
G. SUSPENSION & DRIVELINE INSTALLATION
SUSPENSION LINK BAG
2.6x8mm BCS (2)
G7. Attach ball cups to differential locking cables
1
2
Differential
Cable
Axle Ball Cup (2)
Screw ball cup on until all threads are hidden
Axle Ball Cup
3
4
2.6x8mm
BCS
It is okay to slightly rock
horn to align ball cup.
Do not turn servo shaft
by hand or you could
damage the servo.
NO!
SAFE
2.6x8mm
BCS
NO!
DRIVELINE BAG
3x6mm BCS (4)
G8. Assemble front and rear driveshafts
Short half shaft assembly
CV Cross Pin (4)
Stock Pin (4)
CV Ball
CV Cup (4)
x3
CV Ball (4)
Front driveshaft
Option Part
8140 Long Arm Lift Kit
8140R Long Arm Lift Kit
8140X Long Arm Lift Kit
38 • TRAXXAS TRX-4
CV Cross Pin
Stock
Pin
CV Pin
Retainer
Short Half
Shaft Assembly
Stock
Pin
CV Pin
Retainer
CV Cup
Ensure stock pins
are installed parallel
to each other.
Male Half
Shaft
Short Half
Shaft Assembly
Ensure stock pins
are installed parallel
to each other.
Stock
Pin
CV Cup
Male Half Shafts (2)
3x6mm
BCS
Long Female
Half Shaft
x1
CV Cross Pin
Long Female
Half Shaft
ACCESSORY
CV Ball
Short Female
Half Shaft
Short Female
Half Shafts (3)
CV Pin Retainer (4)
Long half shaft assembly
3x6mm
BCS
CV Pin
Retainer
Long Half Shaft
Assembly
Male Half
Shaft
CV Cup
Stock
Pin
CV Cup
CV Pin
Retainer
Short Half
Shaft Assembly
Rear driveshaft
G. SUSPENSION & DRIVELINE INSTALLATION
DRIVELINE BAG
G9. Install front and rear driveshafts
3x10mm Screw Pin (4)
Front driveshaft installation
3x10mm
Screw Pin
3x10mm
Screw Pin
Rear driveshaft installation
3x10mm
Screw Pin
3x10mm
Screw Pin
Completed suspension & driveline installation
Check your assembly carefully.
TRAXXAS TRX-4 • 39
H. FINAL CHASSIS ASSEMBLY
SUSPENSION LINK BAG
M4x0.7 NL (4)
H1. Assemble wheels and tires; install on front and rear axles
x2
x2
Wheels (4)
Tires with Foam Inserts (4)
Traxxas Ultra
Premium Tire Glue
(Part #6468 Sold Separately)
x4
ACCESSORY
Option Part
Wheel and tire options
available. See parts list.
Glue the tires to the wheels. Use your thumb to push
the side of the tire away from the wheel. Repeat at
four points around the wheel. Turn the wheel over and
repeat on the inside of the wheel.
Note rotation
direction arrow
when installing.
M4x0.7 NL
BODY ACCESSORIES BAG H2. Install body post crossmembers on chassis
3x20mm BCS (4)
Body Post Crossmember (2)
3x20mm
BCS
3x20mm
BCS
3x20mm
BCS
3x20mm
BCS
3x20mm
BCS
40 • TRAXXAS TRX-4
3x20mm
BCS
H. FINAL CHASSIS ASSEMBLY
BODY ACCESSORIES BAG H3. Install front and rear body mounts
Front Body Mount
(Short)
Rear Body Mount
(Long)
3x18mm Screw Pin (4)
Front Body Mount (Short)
Rear Body Mount (Long)
3x18mm
Screw Pin
3x18mm
Screw Pin
Adjust the body mount height
as necessary to fit the body you
choose for your new TRX-4.
(Wheel wells may need to
be trimmed for body to fit.)
BODY ACCESSORIES BAG H4. Assemble and install front and rear bumpers
Front bumper assembly
Front Bumper
Winch
Rear Bumper
4x15mm
Screw Pin
Winch
Bumper D-ring (4)
2.6x8mm BCS
2x12mm CS (4)
2x12mm CS
2.6x8mm BCS
Bumper
D-Rings
4x5mm Yoke Pin (4)
Rear bumper assembly
2x12mm CS
Adjust the bumper length as necessary to fit
the body you choose for your new TRX-4.
4x15mm
Screw Pin
2x12mm CS
ACCESSORY
Option Part
Bumper options
available. See parts list.
Bumper
D-Rings
2x12mm CS
TRAXXAS TRX-4 • 41
H. FINAL CHASSIS ASSEMBLY
BODY ACCESSORIES BAG H5. Attach rock sliders to left and right floor pans
3x8mm BCS (8)
Rock Sliders (2)
Kit assembly complete
42 • TRAXXAS TRX-4
3x8mm
BCS
3x8mm
BCS
3x8mm
BCS
3x8mm
BCS
Note Orientation:
Shorter ends towards front
SAFETY PRECAUTIONS
WARNING! CAUTION! DANGER!
FIRE HAZARD! Your model is able to use LiPo
batteries. Charging and discharging batteries has the
potential for fire, explosion, serious injury, and property damage if
not performed per the instructions. Before use, read and follow all
manufacturer’s instructions, warnings, and precautions. In addition,
Lithium Polymer (LiPo) batteries pose a SEVERE risk of fire if not
properly handled per the instructions and require special care and
handling procedures for long life and safe operation. LiPo batteries
are intended only for advanced users that are educated on the risks
associated with LiPo battery use. Traxxas does not recommend
that anyone under the age of 14 use or handle LiPo battery packs
without the supervision of a knowledgeable and responsible adult.
Dispose of used batteries according to the instructions.
Important Warnings for users of Lithium Polymer (LiPo) batteries:
• LiPo batteries have a minimum safe discharge voltage threshold
that should not be exceeded. The electronic speed control is
equipped with built-in Low-Voltage Detection that alerts the
driver when LiPo batteries have reached their minimum voltage
(discharge) threshold. It is the driver’s responsibility to stop
immediately to prevent the battery pack from being discharged
below its safe minimum threshold.
• Low-Voltage Detection is just one part of a comprehensive plan
for safe LiPo battery use. It is critical to follow all instructions for
safe and proper charging, use, and storage of LiPo batteries. Make
sure you understand how to use your LiPo batteries. If you have
questions about LiPo battery usage, please consult with your local
hobby dealer or contact the battery manufacturer. As a reminder,
all batteries should be recycled at the end of their useful life.
• ONLY use a Lithium Polymer (LiPo) balance charger with a balance
adapter port to charge LiPo batteries. Never use NiMH or NiCadtype chargers or charge modes to charge LiPo batteries. DO NOT
charge with a NiMH-only charger. The use of a NiMH or NiCad
charger or charge mode will damage the batteries and may cause
fire and personal injury.
• NEVER charge LiPo battery packs in series or parallel. Charging
packs in series or parallel may result in improper charger cell
recognition and an improper charging rate that may lead to
overcharging, cell imbalance, cell damage, and fire.
• ALWAYS inspect your LiPo batteries carefully before charging.
Look for any loose leads or connectors, damaged wire insulation,
damaged cell packaging, impact damage, fluid leaks, swelling
(a sign of internal damage), cell deformity, missing labels, or
any other damage or irregularity. If any of these conditions are
observed, do not charge or use the battery pack. Follow the
disposal instructions included with your battery to properly and
safely dispose of the battery.
• DO NOT store or charge LiPo batteries with or around other
batteries or battery packs of any type, including other LiPos.
• Store and transport your battery pack(s) in a cool dry place.
DO NOT store in direct sunlight. DO NOT allow the storage
temperature to exceed 140°F or 60°C, such as in the trunk of a car,
or the cells may be damaged and create a fire risk.
• DO NOT disassemble LiPo batteries or cells.
• DO NOT attempt to build your own LiPo battery pack from
loose cells.
Charging and handling precautions for all battery types:
• BEFORE you charge, ALWAYS confirm that the charger
settings exactly match the type (chemistry), specification, and
configuration of the battery to be charged.
• DO NOT attempt to charge non-rechargeable batteries
(explosion hazard), batteries that have an internal
charge circuit or a protection circuit, batteries that have been
altered from original manufacturer configuration, or batteries that
have missing or unreadable labels, preventing you from properly
identifying the battery type and specifications.
• DO NOT exceed the maximum manufacturer recommended
charge rate.
• DO NOT let any exposed battery contacts or wires touch each
other. This will cause the battery to short circuit and create the risk
of fire.
• While charging or discharging, ALWAYS place the battery (all types
of batteries) in a fire retardant/fire proof container and on a nonflammable surface such as concrete.
• DO NOT charge batteries inside of an automobile. DO NOT charge
batteries while driving in an automobile.
• NEVER charge batteries on wood, cloth, carpet, or on any other
flammable material.
• ALWAYS charge batteries in a well-ventilated area.
• REMOVE flammable items and combustible materials from the
charging area.
• DO NOT leave the charger and battery unattended while
charging, discharging, or anytime the charger is ON with a battery
connected. If there are any signs of a malfunction or in the event
of an emergency, unplug the charger from the power source and
disconnect the battery from the charger.
• DO NOT operate the charger in a cluttered space, or place objects
on top of the charger or battery.
• If any battery or battery cell is damaged in any way, DO NOT
charge, discharge, or use the battery.
• Keep a Class D fire extinguisher nearby in case of fire.
• DO NOT disassemble, crush, short circuit, or expose the batteries
to flame or other source of ignition. Toxic materials could be
released. If eye or skin contact occurs, flush with water.
• If a battery gets hot to the touch during the charging process
(temperature greater than 110°F / 43°C), immediately disconnect
the battery from the charger and discontinue charging.
• Allow the battery pack to cool off between runs (before charging).
• ALWAYS unplug the charger and disconnect the battery when not
in use.
• ALWAYS unplug the battery from the electronic speed control
when the model is not in use and when it is being stored or
transported.
• DO NOT disassemble the charger.
• REMOVE the battery from your model or device before charging.
• DO NOT expose the charger to water or moisture.
• ALWAYS store battery packs safely out of the reach of children
or pets. Children should always have adult supervision when
charging and handling batteries.
• Nickel-Metal Hydride (NiMH) batteries must be recycled or
disposed of properly.
• Always proceed with caution and use good common sense at all
times.
TRAXXAS TRX-4 • 43
SAFETY PRECAUTIONS
All of us at Traxxas want you to safely enjoy your new model. Operate
your model sensibly and with care, and it will be exciting, safe, and fun
for you and those around you. Failure to operate your model in a safe
and responsible manner may result in property damage and serious
injury. The precautions outlined in this manual should be strictly
followed to help ensure safe operation. You alone must see that the
instructions are followed and the precautions are adhered to.
Important Points to Remember
• Your model is not intended for use on public roads or congested
areas where its operation can conflict with or disrupt pedestrian or
vehicular traffic.
• Never, under any circumstances, operate the model in crowds of
people. Your model is very fast and could cause injury if allowed to
collide with anyone.
• Because your model is controlled by radio, it is subject to radio
interference from many sources that are beyond your control. Since
radio interference can cause momentary losses of radio control,
always allow a safety margin in all directions around the model in
order to prevent collisions.
• The motor, battery, and speed control can become hot during use. Be
careful to avoid getting burned.
• Don’t operate your model at night, or anytime your line of sight to the
model may be obstructed or impaired in any way.
Speed Control
Your model’s electronic speed control (ESC) is an extremely powerful
electronic device capable of delivering high current. Please closely
follow these precautions to prevent damage to the speed control or
other components.
• Disconnect the Battery: Always disconnect the battery or batteries
from the speed control when not in use.
• Insulate the Wires: Always insulate exposed wiring with heat shrink
tubing to prevent short circuits.
44 • TRAXXAS TRX-4
• Transmitter on First: Switch on your transmitter first before switching
on the speed control to prevent runaways and erratic performance.
• Don’t Get Burned: The ESC and motor can become extremely hot
during use, so be careful not to touch them until they cool. Supply
adequate airflow for cooling.
• Use the Factory-Installed Connectors: Do not change the battery
and motor connectors. Improper wiring can cause fire or damage to
the ESC. Please note that modified speed controls can be subject to a
rewiring fee when returned for service.
• No Reverse Voltage: The ESC is not protected against reverse polarity
voltage.
• No Schottky Diodes: External Schottky diodes are not compatible
with reversing speed controls. Using a Schottky diode with your
Traxxas speed control will damage the ESC and void the 30-day
warranty.
• Always adhere to the minimum and maximum limitations of the
speed control as stated in the specifications table in the Owner’s
Manual. If your
ESC operates on two batteries, do not mix battery types and
capacities. Use the same voltage and capacity for both batteries.
Using mismatched battery packs could damage the batteries and
electronic speed control.
Recycling Traxxas Power Cell NiMH Batteries
Traxxas strongly encourages you to recycle Power Cell NiMH batteries
when they reach the end of their useful life. Do not throw batteries
in the trash. All Power Cell NiMH battery packs display the RBRC
(Rechargeable Battery Recycling Corporation) icon, indicating they are
recyclable. To find a recycling center near you, ask your local hobby
dealer or visit www.call2recycle.org.
QUICK START GUIDE
The following guide is an overview of the procedures for getting your
model running. The complete manual for your model can be viewed
and downloaded by following the link on the cover of this manual or
by scanning the QR code. Please read this entire manual for complete
instructions on the proper use and maintenance of your model.
Read the Safety Precautions
For your own safety, understand where carelessness and misuse could
lead to personal injury and product damage.
Prepare Your Model
Selecting a charger and batteries for your model
Your model does not include a battery or charger. The speed control in
the model is compatible with both LiPo and NiMH batteries. One NiMH
or 2s LiPo battery equipped with a Traxxas High-Current Connector is
required. Traxxas Power Cell iD batteries are strongly recommended
for maximum performance and safer charging. The following chart
lists all the available Power Cell batteries for your model:
LiPo Batteries with iD
2849X 4000mAh 11.1V 3-Cell 25C LiPo Battery
2872X 5000mAh 11.1V 3-Cell 25C LiPo Battery
2843X 5800mAh 7.4V 2-Cell 25C LiPo Battery
2869X 7600mAh 7.4V 2-Cell 25C LiPo Battery
Compatible batteries:
• 6- and 7-cell NiMH • 2- and 3-cell LiPo
ATTENTION: USERS OF NiMH BATTERIES
Your model comes from the factory with Low-Voltage Detection
activated. Low-Voltage Detection is only for use with LiPo batteries. To
disable Low-Voltage Detection, refer to the EZ-Set Tips card attached
to your model, or see the “Electronic Speed Control Adjustments”
section of this guide.
Turning on Your Model
NiMH Batteries with iD
2923X Battery, Power Cell, 3000mAh (NiMH, 7-C flat, 8.4V)
2940X Battery, Series 3 Power Cell, 3300mAh (NiMH, 7-C flat, 8.4V)
2950X Battery, Series 4 Power Cell, 4200mAh (NiMH, 7-C flat, 8.4V)
2960X Battery, Series 5 Power Cell, 5000mAh (NiMH, 7-C flat, 8.4V)
WARNING: FIRE HAZARD!
Users of Lithium Polymer (LiPo) batteries must read the
Warnings and Precautions beginning on page 2. You
MUST use a LiPo charger for LiPo batteries or battery damage
with the potential for fire will result.
Make certain you choose the correct type of charger for the batteries
you select. Traxxas recommends you choose a genuine Traxxas
EZ-Peak iD charger for safer charging and maximum battery life and
performance.
Charger
Part
No.
NiMH
LiPo
Battery
Compatible Compatible
iD
EZ-Peak Plus, 4-amp
2970
YES
YES
YES
3s
EZ-Peak Live, 8-amp
2971
YES
YES
YES
4s
EZ-Peak Dual, 8-amp
2972
YES
YES
YES
3s
Install batteries in the transmitter
The transmitter requires 4 AA alkaline
or rechargeable batteries.
Install battery packs in the model
Install the battery pack with the battery
wires facing the rear of the model. Swing
the battery hold down towards the
chassis and snap (lock) the end into the
front hold-down retainer.
Note: The battery hold down can be
rotated on its pivot to accommodate
different height battery packs.
Max.
Cells
Turn on the transmitter
Always turn the transmitter on first, before turning on the model.
The transmitter’s LED will glow.
Plug the battery into the speed control
Align the + and – markings. Make certain the battery plug is
completely inserted.
Turn on the model
Press and release the EZ-Set button on the speed control. Do not hold
the button down. The speed control’s LED will glow.
1
2
3
Always turn your
transmitter on first.
Plug in the battery.
Turn on the model.
Before Operating Your Model
Check servo operation
Confirm the model’s wheels turn right and left when the transmitter
steering wheel is turned right and left. The front wheels should be
pointing straight ahead. If they are turned slightly, slowly adjust the
steering trim control on the transmitter until they are pointing straight
ahead.
Range test the radio system
With a friend’s help, check servo operation at the farthest distance you
plan to drive the model and confirm that there is no radio interference.
TRAXXAS TRX-4 • 45
QUICK START GUIDE
Operating Your Model
Unlock
Diffs
TU R N
R
HT
IG
TUR
N
LE
Lock
Front
Diff
Lock
Both
Diffs
FT
Switch forward = both differentials locked. Maximum climbing
ability and traction. Reduced steering performance. On surfaces
with good traction, it is normal for the truck to appear to
alternately bind and slip the tires when attempting tight turns with
the differentials fully locked.
Locked differentials can be used at any time, but unlocking
the differentials greatly improves vehicle handling during
high-speed driving.
Transmitter Adjustments
High Gear
Neutral
(full brake in
Crawl Mode)
Brake/Reverse
(Immediate Reverse
in Crawl Mode)
Low Gear
Forward
Note: Return the transmitter’s trigger to neutral and push up again
to activate reverse throttle unless the ESC is in Crawl Mode (see the
“Selecting a Throttle Mode” section for additional information).
If the model becomes stuck against an object, do not continue to
run the motor. Remove the obstruction before continuing.
Do not push or pull objects with the model.
Shifting the High-Low Transmission
TRX-4’s High-Low Transmission is operated via the red rocker switch on
the transmitter grip.
Depress the lower part of the switch to engage High (for
greater speed).
Depress the upper part of the switch to engage Low
(for greater climbing torque).
Shifting from low gear into high gear can be performed at any speed.
For smoother operation, reduce the speed of the model before
shifting from high gear into low gear.
Operating the T-Lock Differentials
The switch on top of the transmitter operates the front and rear
differential locking mechanism. The differentials can be locked or
unlocked at any time during most driving conditions. If the model
is stuck and there is wheelspin on a single wheel (one side of an
unlocked differential is freewheeling), then release the throttle and
allow the wheels to stop before locking the differential. Apply throttle
slowly until the differentials fully engage or disengage.
Switch rearward = both differentials unlocked. Best handling
and steering performance (smaller turning radius). This is the
best setting for most of your driving.
Switch centered = front differential locked. Enhanced climbing
ability and traction as both front tires work to pull the vehicle
forward. This is helpful for steep inclines. Turning radius will be
decreased. Reduced steering performance.
46 • TRAXXAS TRX-4
Throttle Neutral Position
The trigger is set to 50/50 for equal movement in the throttle direction
and reverse/brake direction. Changing the setting to 70/30 will increase
the range of forward trigger travel and decrease brake trigger travel.
Note: You will need to reprogram your electronic speed control to recognize
the 70/30 setting. The default 50/50 setting is recommended.
Steering Trim
Turn the steering trim knob to precisely set
the steering neutral point. To adjust, drive
the vehicle forward slowly while “steering”
with the trim knob until the vehicle travels in
a straight line with no steering input.
Cruise Control
The TRX-4 is equipped with cruise control,
which maintains vehicle speed for more
comfortable long-distance travel (such
as hiking on trails). To operate the cruise
control, accelerate to your desired speed and press the SET button
on the transmitter to lock the speed in. Your model will continue
at the set speed until you apply the brakes. You can fine tune the
speed to exactly match your pace by adjusting the multi-function
knob on the transmitter. Turn the knob clockwise to increase speed,
counterclockwise to reduce speed. You can accelerate and drive
faster with the cruise control set, and the vehicle will resume the set
speed when the throttle is released (Resume function).
The TQi transmitter has additional tuning features that can be accessed
by the MENU and SET buttons. For details, download the complete
manual by following the link on the cover of this manual, or by scanning
the QR code.
Electronic Speed Control Adjustments
ATTENTION: USING LiPo BATTERIES
When you turn your model on, the speed control’s status LED is
green, indicating that Low-Voltage Detection is activated to prevent overdischarging of LiPo batteries. LiPo batteries are intended only for the
most advanced users that are educated on the risks associated with LiPo
battery use.
WARNING: FIRE HAZARD!
Do not use LiPo batteries in this vehicle with
Low-Voltage Detection disabled.
For NiMH battery users, follow these steps to
disable Low-Voltage Detection:
1. Turn the model on. Make sure the LED
on the speed control is on and green.
2. Press and hold the EZ-Set button for ten
seconds. The LED will turn off and then light red,
and the motor will beep three times.
Release the button.
3. Low-Voltage Detection is now DISABLED.
A
Green LED: Hold 10 seconds
B
3 beeps: LED shines red
QUICK START GUIDE
Selecting a Throttle Mode:
SPORT, RACE, TRAINING, TRAIL, OR CRAWL
1. Connect fully charged batteries to the model and turn on your
transmitter.
2. With the model off, press and hold the EZ-Set button until the LED
turns solid green, then solid red, and then begins blinking red. It
will blink once, then twice, then three times, then repeat.
One blink = Sport Mode is the default setting. It allows full forward
and reverse throttle.
Two blinks = Race Mode removes reverse throttle in case your
track does not allow it.
Three blinks = Training Mode will slow the model down by 50%
for young or inexperienced drivers.
Four blinks = Trail Mode is similar to Sport Mode, but with added
drag brake when the throttle trigger is at neutral. This is the default
setting for the TRX-4 and provides a good balance of smooth
driving and additional drag brake for descending hills.
Five blinks = Crawl Mode allows 100% brake (hill hold) with
immediate reverse when the throttle is at neutral. This setting is
best suited for technical courses where very precise movements are
required.
3. Release the EZ-Set button after the number of blinks for the mode
you wish to select. Note: If you missed the mode you wanted, keep the
EZ-Set button pressed down and the blink cycle will repeat.
4. The LED will blink and then turn solid green (Low-Voltage
Detection ACTIVE) or red (Low-Voltage Detection DISABLED).
The model is now ready to drive in the mode you have selected.
LED Codes and Protection Modes
• Slow Blinking Red: Low battery voltage. If you see
this code because a NiMH battery was connected to
an ESC with Low- Voltage Detection turned on, then
follow the calibration steps below to release the code
and change the ESC to NiMH mode.
• Fast Blinking Red and Green: Overvoltage. This
code can appear when a fully charged NiMH battery
is connected to the ESC with Low-Voltage Detection
turned on. Follow the calibration steps below to
release the code and change the ESC to NiMH mode.
• Fast Blinking Red: Overtemp. Allow the ESC to
cool before continuing. The ESC can get too hot in
situations such as climbing and crawling in high gear,
which increases load on the system. Use low gear for
climbing and crawling.
TRAXXAS TRX-4 • 47
ASSEMBLY MANUAL
MODEL 82016-4
6250 TRAXXAS WAY, McKINNEY, TEXAS 75070
1-888-TRAXXAS
190904 KC2560-R05
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