Workshop

HYDRA-MATIC 6L80 (6 Speed)

INTRODUCTION
6L80 (6 Speed)
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.
Copyright © ATSG 2007
1st Printing
July, 2007
DALE ENGLAND
FIELD SERVICE CONSULTANT
ED KRUSE
TECHNICAL CONSULTANT
WAYNE COLONNA
PRESIDENT
PETER LUBAN
TECHNICAL CONSULTANT
JIM DIAL
TECHNICAL CONSULTANT
GREGORY LIPNICK
TECHNICAL CONSULTANT
JERRY GOTT
TECHNICAL CONSULTANT
JON GLATSTEIN
TECHNICAL CONSULTANT
DAVID CHALKER
TECHNICAL CONSULTANT
ROLAND ALVAREZ
TECHNICAL CONSULTANT
MIKE SOUZA
TECHNICAL CONSULTANT
GERALD CAMPBELL
TECHNICAL CONSULTANT
AUTOMATIC TRANSMISSION SERVICE GROUP
18639 S.W. 107 AVENUE
MIAMI, FLORIDA 33157
(305) 670-4161
1
The new Hydra-matic 6L80 (6 Speed) is a fully automatic, six speed, rear wheel drive, electronic controlled
transmission that features clutch to clutch shifting. It was first introduced in the 2006 Corvette with the 6.0L
engine, Cadillac STSV/XLRV with the 4.4L engine, and is scheduled for Pick-ups in 2007, as shown in Figure 1.
It consists primarily of a four element torque converter, two planetary gear sets, five clutch packs, one sprag and
a hydraulic pressurization and control system. Two planetary gear sets provide the six forward gear ratios and
reverse. Changing gear ratios is fully automatic and is accomplished through the use of a Transmission Control
Module (TCM), that is located within the transmission. The TCM receives and monitors various electronic
sensor inputs, and uses this information to shift the transmission at the optimum time. The TCM commands
shift solenoids and variable bleed Clutch Pressure Control (CPC) solenoids within the transmission to control
shift timing. The TCM controls shift feel through the CPC solenoids. The TCM also controls the apply and
release of the torque converter clutch which allows the engine to deliver the maximum fuel efficiency without
sacrificing vehicle performance. This manual contains procedures necessary to diagnose, overhaul and/or
repair the new 6L80 (6 Speed) transmission from General Motors.

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