Powertrax 3710 - Manual (Page 3)

3
Background Information
The differential case is the round housing inside the rear
axle assembly to which the ring gear is bolted and which contains
the differential spider and side gear assembly. It is installed in the
differential carrier, which is the housing that holds the case, drive
pinion gear, bearings, etc. The carrier may be removable (as part
of a “drop-out” unit, or third member), or it may be integral (as
a permanent part of the axle assembly, mounted in the vehicle).
This manual covers the integral carrier design, both C-Clip and
non-C-Clip versions.
The LOCK-RIGHT is designed to fit into standard open
differential cases only, not into limited-slip (clutch-pack) type
cases. If your vehicle contains a limited-slip unit you will need to
purchase a standard open differential case, thrust washers and
pinion shaft before proceeding.
A word about axle shaft thrust blocks: A few differen-
tials, such as the Jeep® AMC-20 and the older 19-tooth Spicer®
44 axle, use a thrust block between the inside ends of the axle
shafts as a part of the end play adjustment. When installing a
LOCK-RIGHT, this block is re-used along with the original axles
so that the original end play adjustment does not change. How-
ever, if the original axles are changed to different original-type
axles, the block will continue to be used but the end play must
be re-adjusted (see the shop manual for the procedure). If the
axle is changed to another type that does not need end-play ad-
justment, such as a one-piece design, the thrust block may be
omitted. (In the Land Cruiser, the block is never used.)
A word about side gear thrust washers: All differentials
originally had a thrust washer under each side gear. Thrust wash-
ers are large in diameter and between about 1/32-inch (.031, or
0,76-mm) and 1/16-inch (.062, or 1,52-mm) thick. If either one
or both are missing from the original differential, obtain new
one(s) before proceeding!