4L60-E_DL

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THM 4L60-E INDEX APPLICATION AND SOLENOID CHART............................... ............................................................................... 3 INTERNAL ELECTRONIC CONTROLS................................................................................................................. 4 SHIFT SPEED CHART....................................................................... ........................................................................ 8 LINE PRESSURE CHECK.................................................... ..................................................................................... 9 TROUBLE SHOOTING CHARTS............................................................................................................................ 10 DIAGNOSTIC TROUBLE CODES........................................................................................................................... 20 WIRING SCHEMATIC.................................................................... .......................................................................... 22 TRANSMISSION DIS-ASSEMBLY........................................................................................................................... 32 TRANSMISSION RE-ASSEMBLY............................................................................................................................ 42 UPDATED LOW REVERSE PISTON........................................................................................................................ 44 UPDATED PRESSURE REGULATOR VALVE........................................................................................................ 77 SPACER PLATE SCREEN LOCATIONS.................................................................................................................. 82 CHECKBALL LOCATIONS....................................................................................................................................... 84 CHECKING PRESSURE SWITCH ASSEMBLY...................................................................................................... 85 MODEL APPLICATION CHART............................................................................................................................... 92 UPDATED OIL FILTER SEAL................................................................................................................................... 94 TORQUE SPECIFICATIONS.................................................................................................................................... 107 SOLENOID RESISTANCE CHART.......................................................................................................................... 109 SPECIAL TOOLS................................................................... .................................................................................... 112

AUTOMATIC TRANSMISSION SERVICE GROUP 18639 S.W. 107TH AVENUE MIAMI, FLORIDA 33157 (305) 670-4161 Copyright © ATSG 1999 2

Updated August, 2003

INTRODUCTION THM 4L60-E

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 transax le 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. 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. "Portions of materials contained herein have been reprinted under license from General Motors Corp, Service & Parts Operations License Agreement Number 0510718." The information and part numbers contained in this booklet have been carefully compiled from industry sources known for their reliability, but ATSG does not guarantee its accuracy. DALE ENGLAND

JIM DIAL

FIELD SERVICE CONSULTANT

TECHNICAL CONSULTANT

WAYNE COLONNA

ED KRUSE

TECHNICAL SUPERVISOR


PETER LUBAN

GREGORY LIPNICK



JON GLATSTEIN

DAVID CHALKER



JERRY GOTT

MIKE SOUZA



GERALD CAMPBELL

ROLAND ALVAREZ



AUTOMATIC TRANSMISSION SERVICE GROUP 18639 S.W. 107TH AVENUE MIAMI, FLORIDA 33157 (305) 670-4161 1

4L60-E_DL

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