Studebaker Champion DG-150, DG-150M, Commander DG-200, DG-200M, DG-250M, President DG-250M, Hudson DG-200 Automatic Transmission Service Manual
Below you will find brief information for Automatic Transmission Champion DG-150, Automatic Transmission Champion DG-150M, Automatic Transmission Commander DG-200, Automatic Transmission Commander DG-200M, Automatic Transmission Commander DG-250M. This document provides information on changes and corrections for Studebaker Automatic Transmission models. It includes details about the identification and application of different transmission models. Along with this, it touches upon important points pertaining to starting the engine by pushing the car, towing cars with automatic transmission, transmission production changes, and service replacement notes. It covers various production changes for Commander, Champion, Hudson models. This document is crucial for anyone working on Studebaker Automatic Transmission.
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STUDEBAKER AUTOMATIC TRANSMISSION STUDEBAKER AUTOMATIC TRANSMISSION Studebaker Champion (1950-55) Studebaker Commander (1950-55) Studebaker Land Cruiser (1950-54) Studebaker President (1955) Hudson (Exc. Jet) (1954) •CHANGES. CAUTIONS. CORRECTIONS ^-AUTOMATIC TRANSMISSION MODEL IDENTIFICATION & APPLICATION (Different transmission models used as follows): Car Model ©Trans. Model Champion (1950-Early 1955)© DG-150 Champion (Late 1955)® DG-150M Commander (1950-Early 1955)© DG-200 Commander (Late 1955)© DG-200M Commander (1955 2nd Series)© DG-250M President (1955) DG-250M Hudson (1954) DG-200 ©—On model plate on left side of transmission case. ©—Before 1955 Engine No. 1,147,699. ©—After 1955 Engine No. 1,147,699. ©—Before 1955 Engine No. V-318,899 (Early 1st Series). ©-yAfter 1955 Engine No. V-318,899 (Late 1st Scries) ©—1955 2 n d Series. See "Starting for 2nd Series on Car Model pages. Engine Numbers" •STARTING ENGINE BT PUSHING CAR: Turn ignition key ON, depress and release accelerator pedal once (to set automatic choke), place transmission selector lever in Neutral "N" position. Push car until speed of 15-20 MPH. is reached, then move selector lever to Drive "D" or Low "L" position. CAUTION—Pushing rather than towing to start engine recommended (car may overtake tow car), •TOWING CARS WITH AUTOMATIC TRANSMISSION: Place transmission selector lever in Neutral "N" position and do not tow car in excess of 30 MPH. •TRANSMISSION SERIAL NO. NOTE—Separate Torque Converter Nos. and Transmission Nos. used: Torque Converter—Stamped on engine side of flywheel adjacent to flywheel ring gear. Transmission—On metal plate on left side of transmission case below oil level gauge. P-1951 COMMANDER ACCELERATOR LINKAGE CHANGE (Serial No. 8133626 Up): Following parts changed to provide smoother accelerator operation: Accelerator Bell-Crank Lever & Bracket Assembly, Accelerator Bell-Crank Lever-to-Transmission Rod, Accelerator Cross Shaft Assembly. P-CAUTION—See Linkage Adjustment Directions connection at this lever (rod must be connected proper hole and all cars not connected alike). P-1951 TRANSMISSION OIL PAN for in PRODUCTION CHANGE: Beginning Champion Serial No. 20171, Commander No. 45792, oil pan reinforced flange used. This pan requires Ve" longer oil pan screws and can be installed on earlier cars if Kit No. 529975 used (includes 14 new longer screws No. 31-0510). P-1951-52 REPLACEMENT TRANSMISSION DESIGN CHANGES—Several changes have been made in design and should be noted when installing these assemblies: Parking Brake Pawl Pivot Pin Case Change Beginning Trans. Serial No. SCO-124103 (1951-52 Commander), No. SCO-1715R (1950 Commander), No. SCH-35085 (1950-52 Champion). As follows: (1) Parking pawl pivots provided with 5/16" x 24 tapped hole in end to facilitate removal. (2) Extension cases which have through pivot pin hole in case have blind bushing installed on open side. (3) "O" ring omitted from parking pawl pivot pins ("O" ring groove retained for interchangeability of parts). NOTE—Complete extension case assemblies changeable regardless of above changes. are inter- Parking Pawl Toggle Arm Fiber Washer—Beginning Trans. Serial Nos. SCO-124523 (1951-52 Commander), No. SCO-1804R (1950 Commander), No. SCH-35086 (1950-52 Champion). A fiber washer is installed on parking pawl toggle arm splined shaft (between pawl and rear of extension case) to align linkage and prevenr bindings. CAUTION—This washer must be re-installed in all transmissions in which it is found on disassembly (see NOTE following for use of STEEL washer). Parking Pawl Toggle Arm Steel Washer—Beginning Trans. Serial No.SCO-133019 (1951-52 Commander), No. SCO-2119R (1950 Commander), No. SCH-37545 (1950-52 Champion). STEEL washer used in place of fiber washer (above). This steel washer or similar washer .067-.071" thick must be used on parking pawl toggle arm splined shaft on these transmissions. CAUTION—Steel washer cannot be used to replace fiber washer used in previous transmissions. P-STUDEBAKER ERRATIC MULTIPLE CLUTCH ACTION CORRECTION: May be caused by oil distributor tube being loose or improperly located. This aluminum distributor tube is located behind the bronze lubricator valve in the main shaft. Check by visual inspection and if found to be loose or improperly located, replace main shaft assembly. Distributor tube is not serviced separately. P-STUDEBAKER FAILURE TO MOVE FORWARD (AFTER REVERSE OPERATION) CORRECTION: May be caused by loss of front oil pump prime. The loss of front oil pump prime is caused by rear pump blowing air out of rear pump inlet hole and at the same tune blowing oil away from front pump inlet hole. To check and correct this condition, take front pump pressure after a long reverse operation. If pressure is zero, remove rear oil pump cover and idler gear. Reinstall rear pump cover and again operate car in reverse. After stopping, shift to "D" or "L" position. Car should now move forward under acceleration. This will confirm that the condition described above is the cause of the forward operation condition. Reinstall rear oil pump idler gear. To correct, remove transmission oil pan and screen and install a new screen with baffle. Before replacing oil screen shroud, drill a Ve," hole at a point y2" above and slightly to the left of the smaller of the two rectangular holes in the shroud (this will place the hole approximately in the corner of the shroud near flanged edge). P-HUDSON "BUZZING" CORRECTION: Increasing the amount of fluid in the transmission (See "Oil Level Change" below), will in most cases correct this condition. On transmissions with Serial No. HA-4275 and lower, where the increased oil capacity does not correct the condition, it will be necessary to install the later type Front & Rear Pump Relief Valve (See "Front & Rear Pump Relief Valve Production Change" below). P-OIL LEVEL CHANGE (ALL HUDSON AUTOMATIC TRANSMISSIONS): Increase the oil capacity from 11 qts. to 12 qts. A new dipstick, with revised markings has been released for service replacement and later production cars. P-HUDSON BAND ADJUSTING SCREW PRODUCTION CHANGE: Beginning with transmission Serial No. HA-9930, a new band adjusting screw is being used in production and for service replacement on older transmissions. The brake anchor strut has also been revised to use the new screw. When replacing the adjusting screw with the later type, it will be necessary to also use the revised anchor strut. The early type adjusting screw can be used with the revised anchor strut. Later type adjusting screw is identified by the V2" radius between threaded portion and screw head. P-HUDSON DETENT SPRING PRODUCTION CHANGE: Beginning with transmission Serial No. HA-10109, a new detent spring, Part No. 311892, is used to provide a more positive selector lever positioning. P-HUDSON FRONT OIL PUMP COLLECTOR RING PRODUCTION CHANGE: A one-piece alloy iron collector ring replaces the two-piece type formerly used in production and for service replacement. P-HUDSON REAR PLANET CARRIER PRODUCTION CHANGE & REPLACEMENT PARTS CAUTION: Beginning with transmission Serial No. HA-6005 a new rear planet carrier assembly entered production. The new planet carrier, Part No. 311406, can be used for service replacement on earlier transmissions when Spacer Washer, Part No. 311412 is also used. The later type carrier can be identified by the machined counterbore in rear hub face to receive the spacer washer. P-TRANSMISSION ASSEMBLY SERVICE REPLACEMENT CHANGE (1951 TO 1953 COMMANDER)— Service replacement transmission assembly (with "Part Throttle Downshift") Part No. 533568 used on 1953 Commander Models, replaces service transmission Part No. 529973 previously furnished for replacement on 1951 & 1952 Commander Models. P-EXTENSION CASE ASSEMBLY REPLACEMENT NOTE (COMMANDER)—Extension Case assembly, Part No. 529984 is furnished as service replacement for all 1951 t o 1953 C o m m a n d e r m o d e l s . See "Part Throttle Downshift" option (with service replacement extension case) following. P-"PART THROTTLE DOWNSHIFT' OPTIONAL WITH SERVICE REPLACEMENT EXTENSION CASE (1951- 52 COMMANDER MODELS)—Extension case assembly can be installed to provide "PartThrottle Downshift" if desired. Extension case is furnished with the direct drive lock-pawl in place, and to prevent "Part Throttle Downshift," install extension case exactly as received. To retain, or convert to "Part Throttle Downshift," remove the Direct Drive Lockup Pawl (located directly below transmission main shaft bearing bore on machined face of extension assembly). P-EXTENSION CASE REPLACEMENT (1953 COMMANDER)—Direct Drive Lockup Pawl must be r e CONTINUED ON NEXT PAGE
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Key Features
- Transmission Identification & Application
- Starting Engine by Pushing Car
- Towing Cars with Automatic Transmission
- Transmission Production Changes
- Service Replacement Notes
- Commander Model Changes
- Champion Model Changes
- Hudson Model Changes