REVERSE POWERFLOW
When the gear selector is moved into the REVERSE position, the front clutch (1, 7) and the rear band (3, 8) are
applied. With the application of the front clutch, engine torque (4, 6) is applied to the sun gear, turning it in a clock-
wise direction. The clockwise rotation of the sun gear causes the rear planet pinions to rotate against engine rota-
tion in a counterclockwise direction. 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 pinions is transferred to the rear annulus
gear, which is splined to the output shaft (2, 5). The output shaft in turn rotates with the annulus gear in a coun-
terclockwise direction giving a reverse gear output. The entire transmission of torque is applied to the rear planetary
gearset only. Although there is torque input to the front gearset through the sun gear, no other member of the gear-
set is being held. During the entire reverse stage of operation, the front planetary gears are in an idling condition.
Reverse Powerflow
1 - FRONT CLUTCH ENGAGED
5 - OUTPUT SHAFT
2 - OUTPUT SHAFT
6 - INPUT SHAFT
3 - LOW/REVERSE BAND APPLIED
7 - FRONT CLUTCH ENGAGED
4 - INPUT SHAFT
8 - LOW/REVERSE BAND APPLIED
21 - 972
AUTOMATIC TRANSMISSION - 48RE - SERVICE INFORMATION
DR/DH