carrier/rear annulus assembly is held or grounded to
the transaxle case.
PLANETARY GEARTRAIN
DESCRIPTION
The planetary geartrain is located between the
input clutch assembly and the rear of the transaxle
case. The planetary geartrain consists of two sun
gears, two planetary carriers, two annulus (ring)
gears, and one output shaft (Fig. 12).
OPERATION
The planetary geartrain utilizes two planetary gear
sets that connect the transmission input shaft to the
output shaft. Input and holding clutches drive or lock
different planetary members to change output ratio
or direction.
DIFFERENTIAL
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. 13).
OPERATION
The differential assembly is driven by the transfer
shaft by way of the differential ring gear. The ring
gear drives the differential case, and the case drives
the driveshafts through the differential gears. The
differential pinion and side gears are supported in
the case by thrust washers and a pinion shaft. Dif-
ferential pinion and side gears make it possible for
front tires to rotate at different speeds while corner-
ing.
TRANSMISSION CONTROL MODULE
DESCRIPTION
The Transmission Control Module (TCM) is located
in the engine compartment on the left (driver’s) side
next to the Power Distribution Center (PDC) (Fig.
14).
OPERATION
The TCM is the controlling unit for all electronic
operations of the transaxle. The TCM receives infor-
mation regarding vehicle operation from both direct
and indirect inputs, and selects the operational mode
of the transaxle. Direct inputs are hard-wired to, and
used specifically by the TCM. Indirect inputs origi-
Fig. 12 Planetary Geartrain
1 – FRONT SUN GEAR ASSEMBLY
2 – #6 THRUST BEARING
3 – #7 THRUST BEARING
4 – REAR CARRIER FRONT ANNULUS ASSEMBLY
5 – REAR SUN GEAR
6 – FRONT CARRIER REAR ANNULUS ASSEMBLY
7 – FRONT SUN GEAR
Fig. 13 Differential Assembly
1 – PINION GEAR
2 – RING GEAR
3 – SHORT STUB SHAFT
4 – DIFFERENTIAL CASE ASSEMBLY
5 – TRANSFER SHAFT
21 - 10 42LE TRANSAXLE LH
DESCRIPTION AND OPERATION (Continued)
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