Manual Transmission and Differential
GENERAL
MT-2
1. General
A: SINGLE-RANGE MODEL
The single-range manual transmission is of a full-time all-wheel-drive design integrating a trans-
mission assembly, front differential, and transfer gear assembly with center differential into a single
unit. The transmission creates five forward speeds and one reverse using the corresponding gears
all provided with inertia lock-key type synchronizers.
The transmission and front differential are housed in an aluminum case which is split into right and
left halves and constitutes also a clutch housing. Located at the rear and joined each other are the
transfer case and extension case which house the transfer gears and center differential as well as
part of the transmission assembly.
The major features of the transmission are as follows:
! The forward speed gears are helical gears featuring high tooth face strength, large tooth contact
areas, and quiet operation.
! Reversing rotation is achieved by making a slidable reverse idler gear engage with both the re-
verse drive gear on the mainshaft and the reverse driven gear integral with the 1st-2nd synchro-
nizer hub on the drive pinion shaft.
The center differential compensates for the difference in front and rear axle speeds. It consists of
a bevel gear set and a viscous coupling located at its rear end which are housed in a single case.
The center differential, together with a pair of transfer gears, transmits the power from the trans-
mission to the drive pinion shaft (front wheel drive shaft) and the rear drive shaft. The viscous cou-
pling functions as a differential-action-control element.
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