Jeep Cherokee 2000 Service Manual - page 1393
REVERSE POWERFLOW
When the gear selector is moved into the reverse
position (Fig. 5), the front clutch and the rear band
are applied. With the application of the front clutch,
engine torque is applied to the sun gear, turning it in
a clockwise direction. The clockwise rotation of the
sun gear causes the rear planet pinions to rotate
against engine rotation in a counterclockwise direc-
tion. The rear band is holding the low reverse drum,
which is splined to the rear carrier. Since the rear
carrier is being held, the torque from the planet pin-
ions is transferred to the rear annulus gear, which is
splined to the output shaft. The output shaft in turn
rotates with the annulus gear in a counterclockwise
direction giving a reverse gear output. The entire
transmission of torque is applied to the rear plane-
tary gearset only. Although there is torque input to
the front gearset through the sun gear, no other
member of the gearset is being held. During the
entire reverse stage of operation, the front planetary
gears are in an idling condition.
Fig. 5 Reverse Powerflow
1 – FRONT CLUTCH ENGAGED
2 – OUTPUT SHAFT
3 – LOW/REVERSE BAND APPLIED
4 – INPUT SHAFT
5 – OUTPUT SHAFT
6 – INPUT SHAFT
7 – FRONT CLUTCH ENGAGED
8 – LOW/REVERSE BAND APPLIED
XJ
AUTOMATIC TRANSMISSION—30RH
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DESCRIPTION AND OPERATION (Continued)