INDEX THM 4L60-E

TH M 4 L 6 0 - 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
TECHNICAL CONSULTANT
PETER LUBAN
GREGORY LIPNICK
TECHNICAL CONSULTANT
TECHNICAL CONSULTANT
JON GLATSTEIN
DAVID CHALKER
TECHNICAL CONSULTANT
TECHNICAL CONSULTANT
JERRY GOTT
MIKE SOUZA
TECHNICAL CONSULTANT
TECHNICAL CONSULTANT
GERALD CAMPBELL
ROLAND ALVAREZ
TECHNICAL CONSULTANT
TECHNICAL CONSULTANT
AUTOMATIC TRANSMISSION SERVICE GROUP
18639 S.W. 107TH AVENUE
MIAMI, FLORIDA 33157
(305) 670-4161
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