Driving Clutches Description; Final Drive - Chrysler 300M Service Manual

LH
DRIVING CLUTCHES
DESCRIPTION
Three hydraulically applied input clutches are used
to drive planetary components. The underdrive, over-
drive, and reverse clutches are considered input
clutches and are contained within the input clutch
assembly (Fig. 154). The input clutch assembly also
contains:
• Input shaft
• Input hub
• Clutch retainer
• Underdrive piston
• Overdrive/reverse piston
• Overdrive hub
• Underdrive hub
Fig. 154 Input Clutch Assembly
1 - INPUT SHAFT
2 - UNDERDRIVE CLUTCH
3 - OVERDRIVE CLUTCH
4 - REVERSE CLUTCH
5 - OVERDRIVE SHAFT
6 - UNDERDRIVE SHAFT
OPERATION
The three input clutches are responsible for driving
different components of the planetary geartrain.
NOTE: (Refer to 21 - TRANSMISSION/TRANSAXLE/
AUTOMATIC - 42LE - DIAGNOSIS AND TESTING) for
a collective view of which clutch elements are
applied at each position of the selector lever.
UNDERDRIVE CLUTCH
The underdrive clutch is hydraulically applied in
first, second, and third (direct) gears by pressurized
fluid against the underdrive piston. When the under-
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.

FINAL DRIVE

DESCRIPTION
The 42LE differential is a conventional open
design. It consists of a hypoid type ring and pinion
set, and a differential case. The differential case con-
sists of pinion and side gears, and a pinion shaft. The
differential case is supported in the transaxle by
tapered roller bearings (Fig. 155).
Fig. 155 Differential Assembly
1 - PINION GEAR
2 - RING GEAR
3 - SHORT STUB SHAFT
4 - DIFFERENTIAL CASE ASSEMBLY
5 - TRANSFER SHAFT
TRANSAXLE 21 - 73