Allison Transmission AT 1545P Service Manual

viii Copyright © 1996 General Motors Corp.
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AT 500, 1500 SERIES AUTOMATIC TRANSMISSIONS
5–3. TRANSMISSION DISASSEMBLY (cont’d)
d. Removal of Breather. . . . . . . . . . . . . . . . .5–2
e. Removal of Governor. . . . . . . . . . . . . . . .5–3
f. Removal of Oil Pan . . . . . . . . . . . . . . . . .5–3
g. Removal of Filter . . . . . . . . . . . . . . . . . . .5–3
h. Removal of Main Control Valve Body . . .5–3
i. Removal of Pump. . . . . . . . . . . . . . . . . . .5–5
j. Removal of Forward Clutch and
Turbine Shaft . . . . . . . . . . . . . . . . . . . . . .5–6
k. Removal of Retarder Components,
Forward Clutch and Turbine Shaft. . . . . .5–6
l. Removal of Fourth Clutch . . . . . . . . . . . .5–7
m. Removal of Third Clutch . . . . . . . . . . . . .5–7
n. Removal of Center Support Assembly. . .5–7
o. Removal of Planetary Gearing. . . . . . . . .5–8
p. Removal of Second Clutch. . . . . . . . . . . .5–9
q. Removal of First Clutch . . . . . . . . . . . . . .5–9
r. Removal of Output Shaft Seal
and Bearing. . . . . . . . . . . . . . . . . . . . . . .5–10
Section 6. REBUILD OF SUBASSEMBLIES
6–1. SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6–1
6–2. GENERAL INFORMATION FOR
SUBASSEMBLY REBUILD . . . . . . . . . . . .6–1
6–3. INSPECTING AND TESTING TORQUE
CONVERTER
a. Preliminary Inspection . . . . . . . . . . . . . . .6–1
b. End Play Check . . . . . . . . . . . . . . . . . . . .6–1
c. Leak Check. . . . . . . . . . . . . . . . . . . . . . . .6–2
d. Inspection of Hub . . . . . . . . . . . . . . . . . . .6–2
e. Preparation for Reuse of Converter . . . . .6–2
6–4. TORQUE CONVERTER
ASSEMBLY — AT 543 MODELS
a. Preliminary Check of End Play . . . . . . . .6–2
b. Disassembly . . . . . . . . . . . . . . . . . . . . . . .6–2
c. Replacement of Needle Bearing
Assembly in Stator Assembly . . . . . . . . .6–4
d. Assembly . . . . . . . . . . . . . . . . . . . . . . . . .6–4
6–5. GOVERNOR
a. Disassembly . . . . . . . . . . . . . . . . . . . . . . .6–7
b. Assembly . . . . . . . . . . . . . . . . . . . . . . . . .6–8
6–6. MAIN CONTROL VALVE BODY
a. Disassembly . . . . . . . . . . . . . . . . . . . . . . .6–8
b. Assembly . . . . . . . . . . . . . . . . . . . . . . . .6–10
6–7. RETARDER CONTROL VALVE BODY
a. Disassembly . . . . . . . . . . . . . . . . . . . . . 6–12
b. Assembly . . . . . . . . . . . . . . . . . . . . . . . 6–13
6–8. TRANSFER PLATE ASSEMBLY
(Retarder Models)
a. Disassembly . . . . . . . . . . . . . . . . . . . . . 6–13
b. Assembly . . . . . . . . . . . . . . . . . . . . . . . 6–14
6–9. OIL PUMP AND FRONT
SUPPORT ASSEMBLY
a. Disassembly . . . . . . . . . . . . . . . . . . . . . 6–14
b. Installation of Stator Shaft
and Bushing . . . . . . . . . . . . . . . . . . . . . 6–16
c. Pump Gear Clearance Check.. . . . . . . . 6–17
d. Assembly . . . . . . . . . . . . . . . . . . . . . . . 6–18
6–10. FORWARD CLUTCH AND TURBINE
SHAFT ASSEMBLY
a. Disassembly . . . . . . . . . . . . . . . . . . . . . 6–20
b. Checking Clutch Pack Clearance
(Models Without Wave Plate) . . . . . . . 6–22
c. Assembly . . . . . . . . . . . . . . . . . . . . . . . 6–23
6–11. RETARDER HOUSING ASSEMBLY
a. Disassembly . . . . . . . . . . . . . . . . . . . . . 6–25
b. Assembly . . . . . . . . . . . . . . . . . . . . . . . 6–25
6–12. FOURTH CLUTCH ASSEMBLY
a. Disassembly . . . . . . . . . . . . . . . . . . . . . 6–25
b. Checking Clutch Pack Clearance. . . . . 6–26
c. Assembly . . . . . . . . . . . . . . . . . . . . . . . 6–27
6–13. CENTER SUPPORT ASSEMBLY
a. Disassembly . . . . . . . . . . . . . . . . . . . . . 6–27
b. Rework of Center Support
Piston Retainer Locating Notches . . . . 6–28
c. Assembly . . . . . . . . . . . . . . . . . . . . . . . 6–28
6–14. PLANETARY GEAR UNIT
a. Disassembly . . . . . . . . . . . . . . . . . . . . . 6–29
b. Assembly . . . . . . . . . . . . . . . . . . . . . . . 6–30
6–15. TRANSMISSION MAIN HOUSING
ASSEMBLY
a. Disassembly . . . . . . . . . . . . . . . . . . . . . 6–32
b. Assembly . . . . . . . . . . . . . . . . . . . . . . . 6–33
6–16. PLANETARY CARRIER ASSEMBLIES
a. Inspection . . . . . . . . . . . . . . . . . . . . . . . 6–34
b. Removal of Pinion Components. . . . . . 6–35
c. Replacing Bushing in Front Planetary Carrier
6–35
d. Installation of Pinion Components. . . . 6–36

Allison Transmission AT 1545P Specifications

General

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