Allison Transmission AT 1545P Service Manual

1–6 Copyright © 1996 General Motors Corp.
AT 500, 1500 SERIES AUTOMATIC TRANSMISSIONS
Mounting:
Engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SAE 3 automotive flywheel
housing with flexplate drive
Vehicle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . One vertical mounting pad each
side
Drive. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Flexplate drive, customer fur-
nished
Rotation (viewed from input):
Input. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clockwise
Output (in forward ranges). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Clockwise
Output location. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
In line with input
Dry weight, approximate (basic configuration):
AT 500 Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 289 lb (131 kg)
AT 1500 Series. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 302 lb (137 kg)
Parking brake (some models). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting provided at rear of
transmission case for OEM-
supplied parking brake.
Output flange . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Supplied by OEM
Hydraulic System:
Fluid capacity, approx. (excluding external
circuits)
Fill From
Factory
Initial Fill
After Rebuild
Refill After
Servicing
U.S. Qts Liters U.S. Qts Liters U.S. Qts Liters
Shallow oil pan — 4.0 inch (102 mm) 13 12 15 14 9 8.5
Deep oil pan — 5.3 inch (135 mm) 20 19 22 21 16 15
Temperatures*:
Sump (max). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 250°F (120°C)
To cooler — converter-out (max) . . . . . . . . . . . . . . . . . . . . . . . . 300°F (150°C)
To cooler — retarder-out (max) . . . . . . . . . . . . . . . . . . . . . . . . . 330°F (165°C)
Normal operation (sump) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 160–200°F (71–93°C)
Normal operation (converter-out) . . . . . . . . . . . . . . . . . . . . . . . . 180–220ºF (82–104ºC)
Oil filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Refer to Paragraph 3–8
Oil pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Positive displacement
Oil type. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Refer to Paragraph 3–7
Oil pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Refer to Tables 3–4 through 3–9
Clutches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Hydraulic-actuated, spring-released,
self-compensating for wear
Power takeoff (converter driven):
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SAE 6-bolt regular duty
Drive gear. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 pitch, 55 teeth, 20˚ pressure angle
AT 500, 1500 SERIES AUTOMATIC TRANSMISSIONS
* Temperature gauge kit available in Parts Catalog.

Allison Transmission AT 1545P Specifications

General

Brand	Allison Transmission
Model	AT 1545P
Category	Microphone system
Language	English