GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Cadillac
🢒
2000
🢒
Eldorado
🢒
Transmission/Transaxle
🢒
Automatic Transaxle - 4T80-E
🢒 Transmission Overhaul
In order to overhaul, follow the sequence below.
Torque Converter and Oil Pump Drive Shaft Removal
Holding Fixture Installation
Vehicle Speed Sensor and Transmission Fluid Cooler Pipe Fitting Removal
Fourth Servo Removal
Final Drive End Play Measurement
Case Extension and Scavenge Pipe Removal
Differential Carrier and Housing Removal
Output Shaft Removal
Final Drive Carrier, Sun and Internal Gear Removal
Bottom Pan, Gasket, and Scavenge Screens Removal
Lower Control Valve Body Assembly Removal
Input Shaft End Play Measurement
Side Cover, Gasket, and Filter Removal
Oil Pump, Upper Control Valve Assembly Removal
Case Cover Removal
Drive/Driven Sprocket and Chain Removal
Input Speed Sensor and Wiring Harness Removal
Second Clutch Plates and Reverse Clutch Removal
4th Band and Third Clutch/Reaction Shell Removal
Parking Pawl Removal
Forward Clutch Assembly and Low Reverse Band Removal
Manual Shaft Assembly Removal
Case Inspection
Drive Sprocket Support and Seal Replacement
Forward and Coast Clutch Assembly Overhaul
Low/Reverse Band and Fretting Ring Installation
Forward and Coast Clutch Installation
Final Drive Internal Gear and Snap Ring Installation
Forward Clutch Support Stud Installation
Parking Pawl and Pivot Pin Install
Third Clutch and Reaction Carrier Disassemble
Third Clutch and Reaction Carrier Assemble
Reaction Carrier/Shell and Third Clutch Installation
4th Band Installation
Reverse Clutch Housing and Second Sprag Disassemble
Reverse Clutch Housing and Second Sprag Assemble
Reverse Clutch Housing Installation
Second Clutch Plates Installation
Driven Sprocket Support Disassemble
Driven Sprocket Support Assemble
Drive Sprocket, Driven Sprocket, and Drive Link and Assemble
Thrust Bearings Installation
Case Cover/Turbine Shaft Seal Replacement
Case Cover Assembly Installation
Assembly End Play Measurement
Control Valve Upper Body Disassemble
Control Valve Upper Body Assemble
Upper Control Valve Assembly Installation
Pump Disassemble
Secondary Pump Disassemble
Secondary Pump Assemble
Pump Assemble
Pump Installation
Temperature Sensor, Torque Converter Clutch Solenoid Valve, and Pressure Control Solenoid Valve Assemble
Oil Filter and Side Cover Install
Control Valve Lower Body Disassemble
Control Valve Lower Body Disassemble
Control Valve Lower Body Assemble
Channel Plate Assemble
Lower Control Valve Body and Transmission Fluid Pressure Switch Install
Accumulator Housing Disassemble
Accumulator Housing Assemble
Lower Controls Assembly Installation
Manual Link and Wire Harness Connection
Scavenge Screens/Seals, Bottom Pan Installation
Final Drive Carrier Inspect
Differential Carrier Overhaul
Final Drive Carrier/Differential Carrier Install
Output Shaft Installation
Scavenge Pipe Installation
Case Extension Install/Final Drive End Play Check
Fourth Servo Overhaul
Vehicle Speed Sensor and Transmission Fluid Cooler Pipe Fitting Installation
Axle Seals Replacement
Torque Converter and Oil Pump Drive Shaft Install