Section 206 (Automatic Transmission - 4T80-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis)
WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
- Diagnostic Information And Procedures
- Symptoms - Automatic Transmission
- Transmission Fluid Check
- Line Pressure Check
- Road Test
- Torque Converter Diagnosis
- Flex Plate/Torque Converter Vibration Test
- Noise and Vibration Analysis
- Clutch Plate Diagnosis
- Engine Coolant/Water in Transmission
- Fluid Leak Diagnosis
- Case Porosity Repair
- Line Pressure Adapter and Gage Installation
- Shift Solenoid Leak Test
- Transmission Fluid Cooler Flushing and Flow Test (J 45096)
- Transmission Fluid Cooler Flushing and Flow Test (J 35944-A)
- Bushing and Mating Shaft Inspection
- Automatic Transmission Fluid Leaks
- Harsh Shifts
- Low Line Pressure
- Second Gear Starts
- Transmission Slips in Reverse
- Soft Shifts
- No First Gear D2, D3, D4
- No Second Gear D2, D3
- No Third Gear - D3
- No Fourth Gear
- No First Gear
- Inconsistent Shifts
- Third and Fourth Gears Only
- No Engine Braking
- No Overrun Braking in D3
- No Overrun Braking in D2
- No Engine Braking in D1
- Forward Motion in N
- Engine Stall
- Loss of Power
- Loss of Drive
- Engine Starts in Gear
- No Gear Selection
- Shift Lever Indicates Wrong Gear
- No Torque Converter Clutch Apply
- Soft Torque Converter Clutch Apply
- Early Torque Converter Clutch Engagement
- Torque Converter Clutch Not Disengaging
- Converter Ballooning
- No Torque Multiplication
- No Reverse
- Does Not Stay in Park
- Extended or Delayed Upshifts
- Delayed Park to Reverse/Drive Engagement
- Noise in All Ranges
- Whine Noise Varying with RPM or Fluid Pressure
- Popping Noise
- Buzz Noise or High Frequency Rattle Sound
- Whine/Growl Noise That Changes with Vehicle Speed
- Final Drive Noise or Hum Noise
- Noise in First, Second, Third, or Fourth
- Vibration Diagnosis
- Fluid Foaming
- Repair Instructions - On Vehicle
- Transmission Control Module Replacement
- Range Selector Lever Cable Adjustment
- Automatic Transmission Range Selector Cable Replacement - Column
- Automatic Transmission Range Selector Cable Replacement - Console
- Floor Shift Control Knob Replacement
- Transmission Control Replacement
- Torque Converter Clutch/Cruise Control Release Switch Replacement
- Torque Converter Clutch/Cruise Control Release Switch Adjustment
- Transfer Oil Pump Inlet Screen and Pipe Seal Replacement
- Case Extension Replacement
- Differential Carrier Replacement
- Vehicle Speed Sensor Replacement
- Case Extension Axle Seal Replacement - Right Side
- Case Cover Axle Seal Replacement - Left Side
- Transmission Fluid Cooler Hose/Pipe Quick-Connect Fitting Disconnection and Connection
- Transmission Fluid Cooler Hose/Pipe Replacement
- Torque Converter Cover Replacement
- Automatic Transmission Fluid Pressure Test Hole Plug Replacement
- Transmission Fluid Level Indicator Replacement
- Detent Lever and Roller Assembly Replacement
- Control Valve Body Assembly Replacement
- Final Drive Assembly Replacement
- Final Drive Internal Gear Replacement
- Output Shaft Replacement
- Parking Pawl Replacement
- Parking Gear Replacement
- Transmission Mount Inspection
- Transmission Brace Replacement
- Transmission Rear Mount Replacement
- Transmission Mount Replacement - Left Side
- Transmission Rear Mount Bracket Replacement
- Transmission Mount Bracket Replacement - Left Side
- Transmission Replacement
- Repair Instructions - Off Vehicle
- 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
- Fluid Pan, Gasket, and Transfer Oil Pump Inlet Screen Removal
- Lower Control Valve Body Assembly Removal
- Input Shaft End Play Measurement
- Auxiliary Control Valve Body Cover, Fluid Filter Seal, 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
- Park Pawl Removal
- Forward Clutch Plate Assembly and Low and Reverse Band Removal
- Manual Shift Detent Lever with Manual Shift 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
- 3rd Clutch Plate Assembly 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
- Clutch Air Check
- 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
- Auxiliary Control Valve Body 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 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
- Vehicle Speed Sensor and Transmission Fluid Cooler Pipe Fitting Installation
- Axle Seals Replacement
- Torque Converter and Oil Pump Drive Shaft Install
- Description And Operation
- Transmission General Information
- Definitions and Abbreviations
- Transmission Identification Information
- Transmission General Description
- Transmission Component and System Description
- Dry Sump Oil System
- Transmission Adaptive Functions
- Transmission Indicators and Messages
- Electronic Component Description
- 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
- Special Tools