OPERATION
The 42RLE transmission ratios are:
First
2.84 : 1
Second
1.57 : 1
Third
1.00 : 1
Overdrive
0.69 : 1
Reverse
2.21 : 1
FIRST GEAR POWERFLOW
In first gear range, torque input is through the underdrive clutch (1) to the underdrive hub assembly. The underdrive
hub is splined to the rear sun gear. When the underdrive clutch is applied, it rotates the underdrive hub and rear
sun gear. The L/R clutch (2) is applied to hold the front carrier/rear annulus assembly. The rear sun gear drives the
rear planetary pinion gears. The rear planetary pinion gears are forced to walk around the inside of the stationary
rear annulus gear. The pinions are pinned to the rear carrier and cause the rear carrier assembly to rotate as they
walk around the annulus gear. This provides the torque output for first gear. The other planetary gearset compo-
nents are freewheeling. The first gear ratio is 2.84:1.
First Gear Powerflow
1 - UNDERDRIVE CLUTCH APPLIED (Turns Rear Sun)
2 - LOW-REVERSE CLUTCH APPLIED (Holds Rear Annulus/Front Carrier)
HB
AUTOMATIC TRANSMISSION 42RLE - SERVICE INFORMATION
21 - 177