Section 249 (Automatic Transaxle - 4T80-E - Overhaul)
WARNING: This page is about a different car, the 2006 Cadillac DTS and 2006 Buick Lucerne. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Component Locator
- Repair Instructions
- Torque Converter and Oil Pump Drive Shaft Removal
- Holding Fixture Installation
- OSS Sensor and Cooler 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
- Fourth 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
- Fourth Band Installation
- Reverse Clutch Housing and Second Sprag Disassemble
- Reverse Clutch Housing and Second Sprag Assemble
- Reverse Clutch Housing Installation
- Second Clutch Plates Installation
- Clutch Air Check
- Driven Sprocket Support Disassemble
- Driven Sprocket Support Assemble
- Drive Link and Sprockets Assemble
- Thrust Bearings Installation
- Case Cover/Turbine Shaft Seal Replacement
- Case Cover Assembly Installation
- Assembly End Play Measurement
- Upper Control Valve Body Disassemble
- Upper Control Valve 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, and Pressure Control Solenoid Valve Assemble
- Oil Filter and Side Cover Install
- Lower Control Valve Body Assembly Disassemble
- Lower Control Valve Body Disassemble
- Lower Control Valve Body Assemble
- Channel Plate Assemble
- Lower Control Valve Body and Internal Mode Switch Installation
- 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
- OSS Sensor and Cooler Fitting Installation
- Axle Seals Replacement
- Torque Converter and Oil Pump Drive Shaft Install
- Description and Operation
- Automatic Transmission Hydraulic Diagrams
- Park - Engine Running
- Reverse
- Neutral - Engine Running
- Overdrive Range, First Gear
- Overdrive Range, Second Gear
- Overdrive Range, Third Gear
- Overdrive Range, Fourth Gear
- Overdrive Range, Fourth Gear - Torque Converter Clutch Applied
- Overdrive Range, 4-3 Downshift
- Manual Third Gear
- Manual Second Gear
- Manual First Gear
- Fluid Passages
- Automatic Transmission Hydraulic Diagrams
- Special Tools and Equipment