GM THM 4T80-E – ATSG (Automatic Transmission Service Group)
This Manual contains the general description, diagnosis charts, and the procedures necessary to overhaul, repair or service the General Motors THM 4T80-E four speed automatic overdrive transaxle. This information will assist you in training your technicians to provide your customers with the best possible transmission service that is available.
The THM 4T80-E is a fully automatic, front wheel drive, electronically controlled transaxle. It provides four forward speeds with 4th gear being overdrive. Shift points are controlled by the Powertrain Control Module (PCM) with two shift solenoids. Oil pressure is supplied by two gear type pumps. Oil pressure is regulated by the PCM using a Pressure Control Solenoid. Shift schedule and TCC apply rates are also controlled by the PCM and are influenced by many inputs from various sensors on the vehicle.
Applications:
- 1996–2005 Cadillac Deville Concours/DTS
- 1993-2002 Cadillac Eldorado ETC
- 1993-2004 Cadillac Seville STS
- 1995-1999 Oldsmobile Aurora
- 2004–2005 Pontiac Bonneville GXP
- 2006-2011 Buick Lucerne V8
- 2001-2003 Oldsmobile Aurora V8
CONTENTS
- SOLENOID LOCATIONS
- ELECTRONIC CONTROLS DESCRIPTION
- TROUBLE CODE CHART
- ONBOARD DIAGNOSTIC
- WIRE SCHEMATIC
- CASE CONNECTOR PIN I.D
- LINE PRESSURE TEST
- OIL PASSAGE I.D
- CASE COVER CHECKBALL LOCATIONS
- LOWER VALVE BODY CHECKBALL LOCATIONS
- ACCUMULATOR HOUSING CHECKBALL LOCATIONS
- TRANSAXLE DISASSEMBLY
- COMPONENT SUB-ASSEMBLY
- TRANSAXLE RE-ASSEMBLY
- INPUT SHAFT END-PLAY MEASUREMENT
- FINAL DRIVE END-PLAY MEASUREMENT
- TORQUE SPECIFICATIONS
- BOLT LOCATIONS AND IDENTIFICATION
- AIR CHECKING PROCEDURES
- SPECIAL TOOL REQUIREMENTS
Language: English
Format: PDF
Pages: 112
G.M. THM 4T80-E – ATSG (Automatic Transmission Service Group) PDF free online