Copyright © 1996 General Motors Corp. vii
AT 500, 1500 SERIES AUTOMATIC TRANSMISSIONS
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3–16. REPLACEMENT OF COMPONENTS
WHILE TRANSMISSION IS IN THE
VEHICLE CHASSIS (
cont’d)
e. Installation of Speedometer Drive
Gear or Speed Sensor Wheel and
Selective Spacer . . . . . . . . . . . . . . . . . . .3–18
f. Installation of Output Shaft Bearing
and Snapring. . . . . . . . . . . . . . . . . . . . . .3–19
g. Installation of Output Seal . . . . . . . . . . .3–19
h. Installation of Output Flange . . . . . . . . .3–19
3–17. TROUBLESHOOTING — BEFORE
REMOVAL OR OPERATION OF
TRANSMISSION
a. Visual Inspection . . . . . . . . . . . . . . . . . .3–19
b. Vacuum Modulator Check . . . . . . . . . . .3–19
3–18. TROUBLESHOOTING — BEFORE
REMOVAL AND DURING OPERATION
a. Determine Cause of Trouble . . . . . . . . .3–21
b. Proper Engine Tuning. . . . . . . . . . . . . . .3–21
c. Hydraulic Pressure Checking
Procedures. . . . . . . . . . . . . . . . . . . . . . . .3–21
3–19. TROUBLESHOOTING — TRANSMISSION
REMOVED FROM VEHICLE . . . . . . . . . .3–21
3–20. TROUBLESHOOTING PROCEDURES. . .3–21
Section 4. GENERAL OVERHAUL
INFORMATION
4–1. SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4–1
4–2. TOOLS AND EQUIPMENT
a. Improvised Tools and Equipment . . . . . .4–1
b. Special Tools . . . . . . . . . . . . . . . . . . . . . .4–1
c. Mechanic’s Tools, Shop Equipment . . . .4–8
4–3. REPLACEMENT PARTS
a. Ordering Information . . . . . . . . . . . . . . . .4–9
b. Parts Normally Replaced . . . . . . . . . . . . .4–9
4–4. CAREFUL HANDLING . . . . . . . . . . . . . . . .4–9
4–5. CLEANING, INSPECTION
a. Dirt-Free Assembly . . . . . . . . . . . . . . . . .4–9
b. Cleaning Parts. . . . . . . . . . . . . . . . . . . . . .4–9
c. Cleaning Bearings. . . . . . . . . . . . . . . . . . .4–9
d. Inspecting Bearings . . . . . . . . . . . . . . . .4–10
e. Keeping Bearings Clean. . . . . . . . . . . . .4–10
f. Inspecting Cast Parts,
Machined Surfaces . . . . . . . . . . . . . . . . .4–10
g. Inspecting Bushings, Thrust Washers . . 4–11
h. Inspecting Oil Seals, Gaskets. . . . . . . . 4–11
i. Inspecting Gears. . . . . . . . . . . . . . . . . . 4–12
j. Inspecting Splined Parts . . . . . . . . . . . . 4–12
k. Inspecting Threaded Parts. . . . . . . . . . . 4–12
l. Inspecting Snaprings . . . . . . . . . . . . . . 4–12
m. Inspecting Springs . . . . . . . . . . . . . . . . 4–12
n. Inspecting Clutch Plates . . . . . . . . . . . . 4–12
o. Inspecting Swaged, Interference-Fit
Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–12
p. Inspecting Balls in Clutch Housings . . 4–12
q. Inspecting Seal Contact Surfaces . . . . . 4–12
4–6. ASSEMBLY PROCEDURES
a. Clutches, Pistons. . . . . . . . . . . . . . . . . . 4–13
b. Parts Lubrication. . . . . . . . . . . . . . . . . . 4–13
c. External Pipe Plugs, Hydraulic
Fittings . . . . . . . . . . . . . . . . . . . . . . . . . 4–13
d. Oil-Soluble Grease . . . . . . . . . . . . . . . . 4–13
e. Lip-Type Seals (Metal Encased) . . . . . 4–13
f. Interference-Fit Parts . . . . . . . . . . . . . . 4–13
g. Sleeve-Type Bearings and Bushings . . 4–13
h. Bearings (Ball or Roller). . . . . . . . . . . . 4–13
4–7. REMOVING (OR INSTALLING)
TRANSMISSION
a. Drain Transmission Fluid. . . . . . . . . . . 4–14
b. Check Linkages and Lines . . . . . . . . . . 4–14
c. Remove, Clean Transmission. . . . . . . . 4–14
d. Transmission Installation.. . . . . . . . . . . 4–14
4–8. WEAR LIMITS . . . . . . . . . . . . . . . . . . . . . 4–14
4–9. SPRING SPECIFICATIONS. . . . . . . . . . . 4–14
4–10. TORQUE SPECIFICATIONS. . . . . . . . . . 4–14
Section 5. DISASSEMBLY OF
TRANSMISSION
5–1. SCOPE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–1
5–2. GENERAL INFORMATION
a. General Information . . . . . . . . . . . . . . . 5–1
b. Removal of Exterior Hoses and Lines . . 5–1
5–3. TRANSMISSION DISASSEMBLY
a. Mounting of Transmission in
Table-Mounted Holding Fixture . . . . . . 5–1
b. Removal of Torque Converter . . . . . . . . 5–2
c. Removal of Vacuum Modulator,
Mechanical Actuator. . . . . . . . . . . . . . . . 5–2
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