drive clutch is applied, the underdrive hub drives the
rear sun gear.
OVERDRIVE CLUTCH
The overdrive clutch is hydraulically applied in
third (direct) and overdrive gears by pressurized fluid
against the overdrive/reverse piston. When the over-
drive clutch is applied, the overdrive hub drives the
front planet carrier.
REVERSE CLUTCH
The reverse clutch is hydraulically applied in
reverse gear only by pressurized fluid against the
overdrive/reverse piston. When the reverse clutch is
applied, the front sun gear assembly is driven.
HOLDING CLUTCHES
DESCRIPTION
Two hydraulically applied multi-disc clutches are
used to hold planetary geartrain components station-
ary while the input clutches drive others. The 2/4
and Low/Reverse clutches are considered holding
clutches and are contained at the rear of the tran-
saxle case. (Fig. 11).
OPERATION
NOTE: Refer to the “Elements In Use” chart in
Diagnosis and Testing for a collective view of which
clutch elements are applied at each position of the
selector lever.
2/4 CLUTCH
The 2/4 clutch is hydraulically applied in second
and fourth gears by pressurized fluid against the 2/4
clutch piston. When the 2/4 clutch is applied, the
front sun gear assembly is held or grounded to the
transaxle case.
LOW/REVERSE CLUTCH
The Low/Reverse clutch is hydraulically applied in
park, reverse, neutral, and first gears by pressurized
fluid against the Low/Reverse clutch piston. When
the Low/Reverse clutch is applied, the front planet
Fig. 10 Input Clutch Assembly
1 – INPUT SHAFT
2 – UNDERDRIVE CLUTCH
3 – OVERDRIVE CLUTCH
4 – REVERSE CLUTCH
5 – OVERDRIVE SHAFT
6 – UNDERDRIVE SHAFT
Fig. 11 2/4 and Low/Reverse Clutches
1 – FRONT PLANET CARRIER/REAR ANNULUS
2 – 2/4 CLUTCH
3 – L/R CLUTCH
4 – REAR PLANET CARRIER/FRONT ANNULUS
5 – REAR SUN GEAR
6 – FRONT SUN GEAR ASSEMBLY
LH 42LE TRANSAXLE 21 - 9
DESCRIPTION AND OPERATION (Continued)
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