Allison Transmission 1000/2000 Operator`s Manual

2.0 SHIFT SELECTORS

2.1 DESCRIPTION OF AVAILABLE TYPES

The Pupil Transport/Shuttle Series PTS transmissions use lever­type shift selectors. The shift positions on the shift selector can vary according to the shift selector installed.

2.2 OPERATION OF THE SHIFT SELECTOR

The shift selector is used by the operator to select the following ranges:

• P (Park) for transmissions with park pawls

• PB (Auto­Apply Parking Brake) for vehicles with automatically engaged parking brakes

• R (Reverse)

• N (Neutral)

• D (Drive) *

• 4 (Fourth Range) **

• 3 (Third Range)

**

• 2 (Second Range) **

• 1 (First Range)

Ranges are selected by moving the lever to the desired selector position

(P, PB, R, N, D, 4, 3, 2, or 1). Six speed transmission models have six forward ranges, first through sixth. Five speed transmission models have five forward ranges, first through fifth. Four speed models have four forward ranges, first through fourth. When a forward range has been selected, the

*

The shift selector position representing this gear range may be labeled “5” or “6” (for the highest gear in the range), “OD” (for Overdrive), “D” (for the normal Drive position), “1–5” or “1–6” (for the complete gear range).

**

In calibrations with five forward ranges, one of these selector positions will not be available. In calibrations with six forward ranges, two of these selector positions will not be available.

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transmission automatically upshifts through each range. As the vehicle slows, the transmission will downshift automatically through each range.

The following tables list the shift selector positions and corresponding ranges for all Pupil Transport/Shuttle Series transmissions.

Table 2–1. All 1000 PTS, 2200 PTS, 2350 PTS and 2550 PTS

Transmissions With P (Park) Position

Shift

Selector

Position

P (Park)

R

(Reverse)

Range

Neutral

Reverse

*

Shift

Selector

Position

P (Park)

R

(Reverse)

Range

Neutral

Reverse

*

Shift

Selector

Position

P (Park)

R (Reverse)

Range

Neutral

*

Reverse

N (Neutral)

Neutral

N (Neutral)

Neutral

N (Neutral)

Neutral

D (Drive)

**

1–5 (1–6)

***

D (Drive)

**

1–5 (1–6)

***

D (Drive)

**

1–5 (1–4)

†

4 (Fourth

Range)

3 (Third

Range)

1–4

1–3

4 (Fourth

Range)

2 (Second

Range)

1–4

1–2

3 (Third

Range)

2 (Second

Range)

1–3

1–2

1 (First

Range)

1

1 (First

Range)

1

1 (First

Range)

1

*

**

With Park Pawl engaged.

The shift selector position representing this gear range may be labeled “5” or “6” (for the highest gear in the range), “OD” (for Overdrive), “D” (for the normal Drive position), or “1–5” or

“1–6” (for the complete gear range).

***

Calibration dependent.

†

1–4 in Trailering Mode or 4­Speed Calibration.

Table 2–2. All 2100 PTS, 2300 PTS, and 2500 PTS Transmissions

With PB (Auto­Apply Parking Brake) Position

Range Range Range Shift

Selector

Position

PB (Auto­

Apply

Parking

Brake)

R

(Reverse)

Neutral

*

Reverse

Shift

Selector

Position

PB (Auto­

Apply

Parking

Brake)

R

(Reverse)

Neutral

*

Reverse

Shift

Selector

Position

PB (Auto­

Apply

Parking

Brake)

R

(Reverse)

Neutral

*

Reverse

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Table 2–2. All 2100 PTS, 2300 PTS, and 2500 PTS Transmissions

With PB (Auto­Apply Parking Brake) Position (cont’d)

N (Neutral) Neutral

D (Drive)

**

1–5

4 (Fourth

Range)

1–4

N (Neutral) Neutral

D (Drive)

**

1–5

4 (Fourth

Range)

1–4

N (Neutral) Neutral

D (Drive)

**

1–5 (1–4)

***

3 (Third

Range)

1–3

3 (Third

Range)

1–3 2 (Second

Range)

1–2 2 (Second

Range)

1–2

1 (First

Range)

1 1 (First

Range)

1 1 (First

Range)

1

*

**

With Auto­Apply Parking Brake engaged

The shift selector position representing this gear range may be labeled “5” (for the highest gear in the range), “OD” (for Overdrive), “D” (for the normal Drive position), or “1–5” (for the complete gear range).

***

1–4 in Trailering Mode or 4­Speed Calibration.

Table 2–3. All 1000 and 2000 Product Families Transmissions Without

Either P (Park) or PB (Auto­Apply Parking Brake) Positions

Shift

Selector

Position

R

(Reverse)

Range

Reverse

N (Neutral) Neutral

D (Drive)

**

1–5 (1–6)

***

Shift

Selector

Position

R

(Reverse)

Range

Reverse

N (Neutral) Neutral

D (Drive)

**

1–5 (1–6)

***

Shift

Selector

Position

R

(Reverse)

Range

Reverse

N (Neutral) Neutral

D (Drive)

**

1–5 (1–4)

†

4 (Fourth

Range)

3 (Third

Range)

1–4

1–3

4 (Fourth

Range)

2 (Second

Range)

1–4

1–2

3 (Third

Range)

2 (Second

Range)

1–3

1–2

1 (First

Range)

1 1 (First

Range)

1 1 (First

Range)

1

**

The shift selector position representing this gear range may be labeled “5” or “6” (for the highest gear in the range), “OD” (for Overdrive), “D” (for the normal Drive position), or “1–5” or

“1–6” (for the complete gear range).

***

Calibration dependent.

†

1–4 in Trailering Mode or 4­Speed Calibration.

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