Description And Operation; 30Rh Automatic Transmission - Jeep cherokee 2000 Service Manual

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AUTOMATIC TRANSMISSION—30RH

DESCRIPTION AND OPERATION

The 30RH automatic transmission is used with the

2.5L engine (Fig. 1). The 30RH is three speed trans-

missions with a lock-up clutch in the torque con-

verter. The transmissions contain a front and rear

clutch which function as the input driving compo-

nents. They also contain the kickdown (front) and the

low/reverse (rear) bands which, along with the over-

running clutch, serve as the holding components. The

driving and holding components combine to select the

necessary planetary gear components, in the front

and rear planetary gear set, transfer the engine

power from the input shaft through to the output

shaft. The transmissions contain a governor that is

mounted on the output shaft and supplies pressure

to the valve body based on the output shaft speed.

The valve body is mounted to the lower side of the

transmission and contains the valves to control pres-

sure regulation, fluid flow control, and clutch/band

application. The oil pump is mounted at the front of

the transmission and is driven by the torque con-

verter hub. The pump supplies the oil pressure nec-

essary for clutch/band actuation and transmission

lubrication. The 30RH transmission is cooled by an

integral fluid cooler inside the radiator.

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