GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Cadillac
🢒
2008
🢒
DTS
🢒
Transmission/Transaxle
🢒 Automatic Transaxle - 4T80-E
Transmission/Transaxle
All Component Locator
Automatic Transmission Electronic Component Views
Component Location
Disassembled Views
Fluid Passages
All Description and Operation
Definitions and Abbreviations
Dry Sump Oil System
Electronic Component Description
Manual First Gear
Manual Second Gear
Manual Third Gear
Neutral - Engine Running
Overdrive Range, 4-3 Downshift
Overdrive Range, First Gear
Overdrive Range, Fourth Gear
Overdrive Range, Fourth Gear - Torque Converter Clutch Applied
Overdrive Range, Second Gear
Overdrive Range, Third Gear
Park - Engine Running
Reverse
Transmission Adaptive Functions
Transmission Component and System Description
Transmission General Description
Transmission General Information
Transmission Identification Information
Transmission Indicators and Messages
All Special Tools and Equipment
Special Tools
Cleaning, Inspection, and Adjustment
Accumulator Housing Disassemble
Assembly End Play Measurement
Case Cover/Turbine Shaft Seal Replacement
Case Extension Install/Final Drive End Play Check
Case Inspection
Clutch Air Check
Control Valve Lower Body Disassemble
Driven Sprocket Support Assemble
Final Drive Carrier Inspect
Final Drive End Play Measurement
Input Shaft End Play Measurement
Range Selector Lever Cable Adjustment
Second Clutch Plates Installation
Torque Converter Clutch/Cruise Control Release Switch Adjustment
Diagnostic Procedures
Automatic Transmission Fluid Leaks
Bushing and Mating Shaft Inspection
Buzz Noise or High Frequency Rattle Sound
Case Porosity Repair
Converter Ballooning
Delayed Park to Reverse/Drive Engagement
Diagnostic Starting Point - Automatic Transmission
Does Not Stay in Park
Early Torque Converter Clutch Engagement
Engine Stall
Engine Starts in Gear
Extended or Delayed Upshifts
Final Drive Noise or Hum Noise
Flex Plate/Torque Converter Vibration Test
Fluid Foaming
Fluid Leak Diagnosis
Forward Motion in N
Harsh Shifts
Inconsistent Shifts
Line Pressure Adapter and Gage Installation
Line Pressure Check
Loss of Drive
Loss of Power
Low Line Pressure
No Engine Braking
No Engine Braking in D1
No First Gear
No First Gear D2, D3, D4
No Fourth Gear
No Gear Selection
No Overrun Braking in D2
No Overrun Braking in D3
No Reverse
No Second Gear D2, D3
No Third Gear - D3
No Torque Converter Clutch Apply
No Torque Multiplication
Noise in All Ranges
Noise in First, Second, Third, or Fourth
Popping Noise
Road Test
Second Gear Starts
Shift Lever Indicates Wrong Gear
Shift Solenoid Leak Test
Soft Shifts
Soft Torque Converter Clutch Apply
Symptoms - Automatic Transmission
Third and Fourth Gears Only
Torque Converter Clutch Not Disengaging
Torque Converter Diagnosis
Transmission Fluid Check
Transmission Fluid Cooler Flushing and Flow Test
Transmission Slips in Reverse
Vibration Diagnosis
Whine Noise Varying with RPM or Fluid Pressure
Whine/Growl Noise That Changes with Vehicle Speed
Diagnostic Trouble Codes
DTC P0218
DTC P0562 or P0563
DTC P0601-P0604 or P062F
DTC P0711
DTC P0712 or P0713
DTC P0716 or P0717
DTC P0722 or P0723
DTC P0741, P0751, or P0756
DTC P0742, P0752, or P0757
DTC P0897
DTC P0961
DTC P0973, P0974, P0976, P0977, P2763, or P2764
DTC P1811
DTC P1820, P1822, P1823, P1825, P1826, or P1915
DTC P2534
Disassembly, Overhaul, Repair, and Assembly
3rd Clutch Plate Assembly and Reaction Carrier Disassemble
4th Band and Third Clutch/Reaction Shell Removal
4th Band Installation
Accumulator Housing Assemble
Auxiliary Control Valve Body Assembly Installation
Auxiliary Control Valve Body Cover, Fluid Filter Seal, and Filter Removal
Axle Seals Replacement
Case Cover Assembly Installation
Case Cover Removal
Case Extension and Scavenge Pipe Removal
Channel Plate Assemble
Control Valve Lower Body Assemble
Control Valve Lower Body Disassemble
Control Valve Upper Body Assemble
Control Valve Upper Body Disassemble
Differential Carrier and Housing Removal
Differential Carrier Overhaul
Drive Sprocket Support and Seal Replacement
Drive/Driven Sprocket and Chain Removal
Driven Sprocket Support Disassemble
DriveSprocket, Driven Sprocket, and Drive Link and Assemble
Final Drive Carrier, Sun and Internal Gear Removal
Final Drive Carrier/Differential Carrier Install
Final Drive Internal Gear and Snap Ring Installation
Fluid Pan, Gasket, and Transfer Oil Pump Inlet Screen Removal
Forward and Coast Clutch Assembly Overhaul
Forward and Coast Clutch Installation
Forward Clutch Plate Assembly and Low and Reverse Band Removal
Forward Clutch Support Stud Installation
Fourth Servo Overhaul
Fourth Servo Removal
Holding Fixture Installation
Input Speed Sensor and Wiring Harness Removal
Low/Reverse Band and Fretting Ring Installation
Lower Control Valve Body and Internal Mode Switch Installation
Lower Control Valve Body Assembly Removal
Lower Controls Assembly Installation
Manual Link and Wire Harness Connection
Manual Shift Detent Lever with Manual Shift Shaft Assembly Removal
Oil Filter and Side Cover Install
Oil Pump, Upper Control Valve Assembly Removal
Output Shaft Installation
Output Shaft Removal
Park Pawl Removal
Parking Pawl and Pivot Pin Install
Pump Assemble
Pump Disassemble
Pump Installation
Reaction Carrier/Shell and Third Clutch Installation
Reverse Clutch Housing and Second Sprag Assemble
Reverse Clutch Housing and Second Sprag Disassemble
Reverse Clutch Housing Installation
Scavenge Pipe Installation
Scavenge Screens/Seals, Bottom Pan Installation
Second Clutch Plates and Reverse Clutch Removal
Secondary Pump Assemble
Secondary Pump Disassemble
Temperature Sensor, Torque Converter Clutch Solenoid Valve, and Pressure Control Solenoid Valve Assemble
Third Clutch and Reaction Carrier Assemble
Thrust Bearings Installation
Torque Converter and Oil Pump Drive Shaft Install
Torque Converter and Oil Pump Drive Shaft Removal
Vehicle Speed Sensor and Transmission Fluid Cooler Pipe Fitting Installation
Vehicle Speed Sensor and Transmission Fluid Cooler Pipe Fitting Removal
Electrical/Electronic Schematic Diagrams
Automatic Transmission Controls Schematics
Electrical/Electronic Specifications
Component Resistance
Transmission Fluid Temperature Sensor Specifications
General Diagnostic Information
Clutch Plate Diagnosis
Engine Coolant/Water in Transmission
Noise and Vibration Analysis
Mechanical Specifications
Fastener Tightening Specifications
Fluid Capacity Specifications
Range Reference
Shift Solenoid Valve State and Gear Ratio
Transmission General Specifications
Other Specifications
Line Pressure
Shift Speed
Torque Converter Clutch Slip Speed
Transmission Internal Mode Switch Logic
Removal, Installation, and Replacement
Automatic Transmission Fluid Pressure Test Hole Plug Replacement
Automatic Transmission Range Selector Cable Replacement - Column
Automatic Transmission Range Selector Cable Replacement - Console
Case Cover Axle Seal Replacement - Left Side
Case Extension Axle Seal Replacement - Right Side
Case Extension Replacement
Control Valve Body Assembly Replacement
Detent Lever and Roller Assembly Replacement
Differential Carrier Replacement
Final Drive Assembly Replacement
Final Drive Internal Gear Replacement
Floor Shift Control Knob Replacement
Output Shaft Replacement
Parking Gear Replacement
Parking Pawl Replacement
Torque Converter Clutch/Cruise Control Release Switch Replacement
Torque Converter Cover Replacement
Transfer Oil Pump Inlet Screen and Pipe Seal Replacement
Transmission Brace Replacement
Transmission Control Module Replacement
Transmission Control Replacement
Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection
Transmission Fluid Cooler Hose/Pipe Replacement
Transmission Fluid Level Indicator Replacement
Transmission Mount Bracket Replacement - Left Side
Transmission Mount Inspection
Transmission Mount Replacement - Left Side
Transmission Rear Mount Bracket Replacement
Transmission Rear Mount Replacement
Transmission Replacement
Vehicle Speed Sensor Replacement