ATSG Cadillac HYDRA-MATIC 6L80 transmission service manual

ATSG Cadillac HYDRA-MATIC 6L80 transmission service manual

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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