Page 24 - Hydra-matic 6 Speed RWD Technician's Guide (October 2005)

TORQUE CONVERTER

TCC HYDRAULIC CIRCUIT - RELEASE TCC HYDRAULIC CIRCUIT - APPLY
The TCC PC solenoid is OFF, which allows actuator The TCC PC solenoid is commanded ON, and the
feed limit fluid to exhaust through the solenoid. Without PCS TCC circuit becomes pressurized. PCS TCC fluid
fluid pressure in the PC TCC circuit, the TCC regulator pressure moves the TCC regulator valve and the TCC
valve and the TCC control valve will remain in the control vale to the apply position. Drive 1 fluid passes
released position. through the TCC regulator valve and becomes regulated
apply fluid. The regulated apply fluid passage travels
to the TCC control valve, and is routed through the
valve into the TCC apply circuit. At the same time,
TCC release fluid is routed to an exhaust passage at
the TCC control valve. The torque converter clutch
will now apply and be held until conditions change to
determine TCC release.

TCC APPLY TCC APPLY

TCC RELEASE TCC RELEASE

TCC APPLY TCC APPLY

CONV FD LIMIT CONVERTER FEED LIMIT EX COOLER FEED CONV FD LIMIT CONVERTER FEED LIMIT EX COOLER FEED

CONV FEED FROM PRESSURE REGULATOR ACT FD LIM PCS TCC PCS TCC TCC CONTROL VALVE DRIVE 1-6 CONV FEED FROM PRESSURE REGULATOR ACT FD LIM PCS TCC PCS TCC TCC CONTROL VALVE DRIVE 1-6

REG APPLY
REG APPLY

SOL 1
SOL 1 SHTL TCC REGULATOR VALVE SHTL TCC REGULATOR VALVE
EX
EX
EX
EX
TCC REG APP TCC REG APP
PRESSURE PRESSURE
CONTROL CONTROL
SOLENOID SOLENOID
N.L. OFF N.L. ON
TCC RELEASE TCC APPLY
Figure 16 15