TH M 4 L 6 0 - EINDEXAPPLICATION 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. . 112AUTOMATIC TRANSMISSION SERVICE GROUP18639 S.W. 107TH AVENUEMIAMI, FLORIDA 33157(305) 670-4161Copyright ATSG 19992
UpdatedAugust, 2003INTRODUCTIONTHM 4L60-EThis booklet contains general description and the procedures necessary to repair, overhaul, or service the newTHM 4L60-E electronic automatic overdrive transmission. The 4L60-E is a fully automatic rear wheel drivetransmission. This unit is basically a THM 700-R4 with electronic controls added to the valve body. The shiftpattern is controlled electronically with 2 shift solenoids that recieve a ground signal from the PowertrainControl Module (PCM). The PCM will vary shift points, as it is constantly interpreting numerous electronicsignals from various operational sensors located on the vehicle.The PCM also controls the apply and release of the Torque Converter Clutch (TCC). This transmission alsorecieved another PWM solenoid in 1995 to control TCC apply feel. Line pressure and shift feel are controlledelectronically with a Pressure Control Solenoid (PCS), located on the valve body and dependent on TPS andVSS signals.Note: There have been many engineering changes in this transax le since its introduction in 1993. ATSGalso has available an "Update Handbook" which includes the many changes and is required along with thismanual 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 orby 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 underlicense from General Motors Corp, Service & Parts OperationsLicense Agreement Number 0510718."The information and part numbers contained in this booklet havebeen carefully compiled from industry sources known for theirreliability, but ATSG does not guarantee its accuracy.DALE ENGLANDJIM DIALFIELD SERVICE CONSULTANTTECHNICAL CONSULTANTWAYNE COLONNAED KRUSETECHNICAL SUPERVISORTECHNICAL CONSULTANTPETER LUBANGREGORY LIPNICKTECHNICAL CONSULTANTTECHNICAL CONSULTANTJON GLATSTEINDAVID CHALKERTECHNICAL CONSULTANTTECHNICAL CONSULTANTJERRY GOTTMIKE SOUZATECHNICAL CONSULTANTTECHNICAL CONSULTANTGERALD CAMPBELLROLAND ALVAREZTECHNICAL CONSULTANTTECHNICAL CONSULTANTAUTOMATIC TRANSMISSION SERVICE GROUP18639 S.W. 107TH AVENUEMIAMI, FLORIDA 33157(305) 670-41611
manual for a proper overhaul or repair. AUTOMATIC TRANSMISSION SERVICE GROUP 18639 S.W. 107TH AVENUE MIAMI, FLORIDA 33157 (305) 670-4161 "Portions of materials contained herein have been reprinted under license from General Motors Corp, Service & Parts Operations License Agreement Number 0510718."