SECOND GEAR POWERFLOW
Second gear is achieved by having both planetary
gear sets (Fig. 4) contribute to torque multiplication.
As in first gear, torque input is through the under-
drive clutch (1) to the rear sun gear. The 2/4 clutch
(2) is applied to hold the front sun gear stationary.
The rotating rear sun gear turns the rear planetary
pinions. The rear pinions rotate the rear annulus/
front carrier assembly. The pinions of the front car-
rier walk around the stationary front sun gear. This
transmits torque to the front annulus/rear carrier
assembly, which provides output torque and a gear
ratio of 1.57:1.
Fig. 4 Second Gear Powerflow
1 - UNDERDRIVE CLUTCH APPLIED (Turns Rear Sun)
2 - 2-4 CLUTCH APPLIED (Holds Front Sun)
21 - 42
AUTOMATIC TRANSMISSION - 42RLE
TJ
AUTOMATIC TRANSMISSION - 42RLE (Continued)