GM Service Manual Online
For 1990-2009 cars only
Makes
🢒
Chevrolet
🢒
2008
🢒
Chevrolet W-Series Commercial W4 (W3500/W4500)
🢒
Transmission/Transaxle
🢒 Automatic Transmission - 4L80-E/4L85-E
Transmission/Transaxle
All Component Locator
Automatic Transmission Electronic Component Views
Component Location
Disassembled Views
Fluid Passages
All Description and Operation
Automatic Transmission Inline 20-Way Connector Description
Definitions and Abbreviations
Electronic Component Description
Manual First Gear
Manual Second Gear
Manual Third Gear
Overdrive Range, 3-2 Downshift
Overdrive Range, 4-3 Downshift
Overdrive Range, First Gear
Overdrive Range, Fourth Gear - Torque Converter Clutch Applied
Overdrive Range, Second Gear
Overdrive Range, Third Gear - Torque Converter Clutch Applied
Park or Neutral - Engine Running
Reverse
Transmission Adaptive Functions
Transmission Component and System Description
Transmission General Description
Transmission General Information
Transmission Identification Information
All Special Tools and Equipment
Special Tools
All Visual Identification
Automatic Transmission Inline 20-Way Connector End View
Automatic Transmission Internal Connector End Views
Automatic Transmission Related Connector End Views
Cleaning, Inspection, and Adjustment
4th Clutch Piston Travel Check
Control Valve Body Cleaning and Inspection
Direct Clutch Piston Travel Check
Forward Clutch Piston Travel Check
Front End Play Check
Front End Play Check
Intermediate Clutch Piston Travel Check
Low and Reverse Band Servo Piston Pin Check
Low and Reverse Band Servo Piston Pin Check
Output Carrier Pinion End Play Measurement
Overdrive Carrier Pinion End Play Check
Overrun Clutch Piston Travel Check
Reaction Carrier Pinion End Play
Rear Unit End Play Check
Rear Unit End Play Check
Torque Converter End Play Inspection
Transmission Case Inspection
Transmission Fluid Pump Body Flatness Check
Transmission Fluid Pump Body to Gear Face Clearance Check
Diagnostic Procedures
Automatic Transmission Fluid Leaks
Case Extension Bearing/Seal Failed
Case Porosity Repair
Converter Ballooning
Delayed Shift 1 to 2
Diagnostic Starting Point - Automatic Transmission
Difficult to Shift Out of Park
Does Not Stay in Park
Engine Stall
Engine Stall in Neutral
Engine Starts in Gear
Erratic Shift Quality
First and Fourth Gear Only - D4
First and Second Gear Only - D4
First Gear Only - D4
Flex Plate/Torque Converter Vibration Test
Fluid Foaming
Fluid Leak Diagnosis
Forward Motion in Neutral
Fourth Gear Starts
Harsh Shift 3 to 4
Harsh Shift 4 to 3
Harsh Shift D to R
Harsh Shift D4 to D3, D2, or D1
Harsh Shifts
High Line Pressure
Inaccurate Shift Points
Inadequate Lubrication
Inadequate Lubrication at Low Line or Heavy Loads
Incorrect Torque Converter Clutch Apply or Release
Line Pressure Check
Loss of Drive
Loss of Power
Low Line Pressure
No D2 to D1
No D3 to D2
No Engine Braking - D1
No Engine Braking - D2
No Engine Braking - D3
No First Gear - D1
No First Gear - D2
No First Gear - D3
No First Gear - D4
No Fourth Gear - D4
No Gear Selection
No Overrun Braking - D1
No Overrun Braking - D2
No Overrun Braking - D3
No Park
No Reverse
No Second Gear - D1
No Second Gear - D2
No Second Gear - D3
No Second Gear - D4
No Second Gear Engine Braking - D2
No Third Gear - D3
No Third Gear - D4
No Torque Converter Clutch Apply
No Torque in Reverse and Third
No Torque in Second Gear
No Torque Multiplication
Noise
Oil Out the Vent Tube
Range Selector Displays Incorrect Range
Remains in Park
Road Test
Second and Third Gear Only - D4
Second Gear Only - D4
Second Gear Starts
Shift Lever Indicates Wrong Gear
Shift Solenoid Leak Test
Soft Shift 2 to 1
Soft Shift 2 to 3
Soft Shift 3 to 2
Soft Shift D3 to D2
Soft Shift into R
Soft Shift R to D
Soft Shifts
Soft Torque Converter Clutch Apply
Third and Fourth Gear Only - D4
Third Gear Starts
Torque Converter Clutch Slipping
Torque Converter Clutch Stuck On
Torque Converter Diagnosis
Tow/Haul Switch/Indicator Always On or Inoperative
Transmission Fluid Check
Transmission Fluid Cooler Flushing and Flow Test
Transmission Overheats
Transmission Overheats at WOT
Transmission Slips
Vibration
Diagnostic Trouble Codes
Diagnostic Trouble Code (DTC) List/Type
Diagnostic Trouble Code (DTC) Type Definitions
DTC P0218
DTC P0562 or P0563
DTC P0601-P0604 or P062F
DTC P0705
DTC P0711
DTC P0712 or P0713
DTC P0716 or P0717
DTC P071A
DTC P0722 or P0723
DTC P0741, P0751, or P0756
DTC P0742, P0752, or P0757
DTC P0894
DTC P0961
DTC P0973, P0974, P0976, P0977, P2763, or P2764
DTC P1762
DTC P1810, P1816, or P1818
DTC P2534
Symptoms - Automatic Transmission
Disassembly, Overhaul, Repair, and Assembly
3rd and 4th Clutch Accumulator Housing Assemble
3rd and 4th Clutch Accumulator Housing Disassemble
3rd and 4th Clutch Accumulator Housing Installation
3rd and 4th Clutch Accumulator Housing Removal
4th Clutch Assembly Assemble
4th Clutch Assembly Disassemble
4th Clutch Assembly Installation
4th Clutch Assembly Removal
4th Clutch Plate Installation
Case Extension Assembly Installation
Case Extension Assembly Removal
Center Support and Gear Unit Assembly Assemble
Center Support and Gear Unit Assembly Disassemble
Center Support and Gear Unit Assembly Installation
Center Support and Gear Unit Assembly Removal
Center Support Assembly Assemble
Center Support Assembly Disassemble
Center Support Assembly Reconditioning Repair
Center Support Bolt and Transmission Fluid Cooler Pipe Fitting Installation
Control Valve Body Assembly Assemble
Control Valve Body Assembly Disassemble
Control Valve Body Assembly Installation
Control Valve Body Assembly Removal
Direct Clutch Assembly Assemble
Direct Clutch Assembly Disassemble
Direct Clutch Assembly Installation
Direct Clutch Assembly Removal
Forward Clutch Assembly Assemble
Forward Clutch Assembly Disassemble
Forward Clutch Assembly Installation
Forward Clutch Assembly Removal
Forward Clutch Hub Assemble
Holding Fixture Removal
Input and Output Speed Sensor Assembly Installation
Input and Output Speed Sensor Assembly Removal
Intermediate Clutch Assembly Installation
Intermediate Clutch Assembly Removal
Low and Reverse Band and Output Shaft Thrust Washer Installation
Low and Reverse Band Removal
Low and Reverse Band Servo Assembly Assemble
Low and Reverse Band Servo Assembly Disassemble
Low and Reverse Band Servo Assembly Installation
Low and Reverse Band Servo Assembly Removal
Manual 2-1 Band Assembly Installation
Manual 2-1 Band Assembly Removal
Manual 2-1 Band Servo Assembly Assemble
Manual 2-1 Band Servo Assembly Disassemble
Manual 2-1 Band Servo Assembly Installation
Manual 2-1 Band Servo Assembly Removal
Manual Shift Shaft Removal
Output Shaft Seal Installation
Output Shaft Seal Removal
Overdrive Assembly Removal
Overdrive Carrier Assemble
Overdrive Carrier Assembly Assemble
Overdrive Carrier Assembly Disassemble
Overrun Clutch Assembly Assemble
Overrun Clutch Assembly Disassemble
Parking System Components Installation
Parking System Components Removal
Reaction Carrier Assemble
Torque Converter Assembly Installation
Torque Converter Assembly Removal
Transmission Fluid Draining
Transmission Fluid Filter Assembly Installation
Transmission Fluid Filter Assembly Removal
Transmission Fluid Pan Installation
Transmission Fluid Pan Removal
Transmission Fluid Pump Assemble
Transmission Fluid Pump Body Assemble
Transmission Fluid Pump Body Disassemble
Transmission Fluid Pump Cover Assemble
Transmission Fluid Pump Cover Disassemble
Transmission Fluid Pump Disassemble
Transmission Fluid Pump Installation
Transmission Fluid Pump Removal
Transmission Holding Fixture Installation
Transmission Wiring Harness Removal
Turbine Shaft and Overdrive Carrier Installation
Turbine Shaft Assemble
Turbine Shaft Disassemble
Wiring Harness Installation
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
Scan Tool Data Definitions
Scan Tool Data List
Scan Tool Output Controls
Mechanical Specifications
Fastener Tightening Specifications
Fluid Capacity Specifications
Output Shaft Selective Thrust Washer Specifications
Overrun Clutch Housing Selective Thrust Washer Specifications
Range Reference
Shift Solenoid Valve State and Gear Ratio
Transmission General Specifications
Other Specifications
End Play Specifications
Line Pressure
Oil Pump Specifications
Shift Speed
Transmission Fluid Pressure Manual Valve Position Switch Logic
Transmission Range Switch Logic