Input Clutch Assemblies; Underdrive Clutch Hub; Overdrive Hub; Input Clutches - Mitsubishi Eclipse Technical Information Manual

CLUTCH
All flve clutches in the F4ACl transaxle are applied
hydraulically. Four of the clutches are released with
spring. Three of the clutches supply input power
to the planetary geartrain and are called input
clutches. The other two clutches hold components
of the planetary geartrain and are called holding
Overdrive/Reverse Diston 1
C
Underdrive hub
Overdrive
plate
Overdrive
POWER TRAIN

Input Clutch Assemblies

The input clutch assembly is located directly behind the oil
pump housing, and rides on the reaction shaft support journal.
The assembly consists of an input shaft, input hub, clutch
retainer, clutch pistons, an overdrive hub, an underdrive hub
and three input clutches. The clutches are the underdrive clutch,
overdrive clutch and reverse clutch. When the torque converter
turbine (which is splined to the input shaft) turns, the input
shaft, hub, and clutch retainer also turn.

Underdrive Clutch Hub

The underdrive clutch is splined to the underdrive hub assembly.
The underdrive hub and shaft assembly is splined to the rear
rdrive
sun gear. When the underdrive clutch is applied the rear sun
gear is driven (rotated).

Overdrive Hub

The overdrive clutch is splined to the overdrive hub assembly
and the overdrive hub is splined to the front carrier assembly.
The reverse clutch is splined to the front sun gear assembly
and rotates it when applied.

Input Clutches

Each of the three clutches, in the input clutch assembly, have
the job of supplying input power to a particular component
in the planetary gearset when they are hydraulically applied.
They are connected to the planetary gearset through the over-
drive hub and shaft assembly, the underdrive hub and shafta
assembly, and the front sun gear assembly. When any of these
clutches are applied, they turn or drive a component in the
planetary gearset.
clutches. With the exception of direct gear, one input
clutch and one holding clutch must be applied to d
obtain a gear range. In direct gear, two input clutches
are applied and basically connect the input and
output shafts together. This causes the entire gear-
set to rotate as one with no relative motion between
planetary gearset components.