INDEX

Copyright © ATSG 1999

THM 4L60-E

2

APPLICATION AND SOLENOID CHART............................... ............................................................................... 3INTERNAL ELECTRONIC CONTROLS................................................................................................................. 4SHIFT SPEED CHART....................................................................... ........................................................................ 8LINE PRESSURE CHECK.................................................... ..................................................................................... 9TROUBLE SHOOTING CHARTS............................................................................................................................ 10DIAGNOSTIC TROUBLE CODES........................................................................................................................... 20WIRING SCHEMATIC.................................................................... .......................................................................... 22TRANSMISSION DIS-ASSEMBLY........................................................................................................................... 32TRANSMISSION RE-ASSEMBLY............................................................................................................................ 42UPDATED LOW REVERSE PISTON........................................................................................................................ 44UPDATED PRESSURE REGULATOR VALVE........................................................................................................ 77SPACER PLATE SCREEN LOCATIONS.................................................................................................................. 82CHECKBALL LOCATIONS....................................................................................................................................... 84CHECKING PRESSURE SWITCH ASSEMBLY...................................................................................................... 85MODEL APPLICATION CHART............................................................................................................................... 92UPDATED OIL FILTER SEAL................................................................................................................................... 94TORQUE SPECIFICATIONS.................................................................................................................................... 107SOLENOID RESISTANCE CHART.......................................................................................................................... 109SPECIAL TOOLS................................................................... .................................................................................... 112

AUTOMATIC TRANSMISSION SERVICE GROUP18639 S.W. 107TH AVENUEMIAMI, FLORIDA 33157

(305) 670-4161

INTRODUCTIONTHM 4L60-E

1

No part of any ATSG publication may be reproduced, stored in any retrieval system or transmitted in any form or by any means, including but not limited to electronic, mechanical, photocopying, recording or otherwise, without written permission of Automatic Transmission Service Group. This includes all text illustrations, tables and charts.

UpdatedAugust, 2003

DALE ENGLANDFIELD SERVICE CONSULTANT

ED KRUSETECHNICAL CONSULTANT

WAYNE COLONNATECHNICAL SUPERVISOR

PETER LUBANTECHNICAL CONSULTANT

JIM DIALTECHNICAL CONSULTANT

GREGORY LIPNICKTECHNICAL CONSULTANT

JERRY GOTTTECHNICAL CONSULTANT

JON GLATSTEINTECHNICAL CONSULTANT

DAVID CHALKERTECHNICAL CONSULTANT

MIKE SOUZATECHNICAL CONSULTANT

ROLAND ALVAREZTECHNICAL CONSULTANT

GERALD CAMPBELLTECHNICAL CONSULTANT

This booklet contains general description and the procedures necessary to repair, overhaul, or service the new THM 4L60-E electronic automatic overdrive transmission. The 4L60-E is a fully automatic rear wheel drive transmission. This unit is basically a THM 700-R4 with electronic controls added to the valve body. The shift pattern is controlled electronically with 2 shift solenoids that recieve a ground signal from the Powertrain Control Module (PCM). The PCM will vary shift points, as it is constantly interpreting numerous electronic signals from various operational sensors located on the vehicle. The PCM also controls the apply and release of the Torque Converter Clutch (TCC). This transmission also recieved another PWM solenoid in 1995 to control TCC apply feel. Line pressure and shift feel are controlled electronically with a Pressure Control Solenoid (PCS), located on the valve body and dependent on TPS and VSS signals. Note: There have been many engineering changes in this transaxle since its introduction in 1993. ATSG also has available an "Update Handbook" which includes the many changes and is required along with this manual for a proper overhaul or repair.

AUTOMATIC TRANSMISSION SERVICE GROUP18639 S.W. 107TH AVENUEMIAMI, FLORIDA 33157

(305) 670-4161

"Portions of materials contained herein have been reprinted underlicense from General Motors Corp, Service & Parts Operations

License Agreement Number 0510718."

The information and part numbers contained in this booklet havebeen carefully compiled from industry sources known for their

reliability, but ATSG does not guarantee its accuracy.