Operation

OPERATION

The three input clutches are responsible for driving different components of the planetary geartrain.


UNDERDRIVE CLUTCH


The underdrive clutch is hydraulically applied in first, second, third, and fourth (direct) gears by pressurized fluid against the underdrive piston. When the underdrive clutch is applied, the underdrive hub drives the input sun gear.


OVERDRIVE CLUTCH


The overdrive clutch is hydraulically applied in fourth (direct), fifth, and sixth gears by pressurized fluid against the overdrive/reverse piston. When the overdrive clutch is applied, the overdrive hub drives the reverse carrier/input annulus assembly.


REVERSE CLUTCH


The reverse clutch is hydraulically applied in reverse gear by pressurized fluid against the overdrive/reverse piston. When the reverse clutch is applied, the reaction sun gear is driven.