Powertrax 4110 User Manual
Page 3
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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 in-
tegral (as a permanent part of the axle assembly, mounted in the
vehicle). This manual covers the removable third member, tech-
nically known as the Differential and Carrier Assembly.
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 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. However, 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-adjust-
ed (see the shop manual for the procedure). If the axle is changed
to another type that does not need end-play adjustment, such as
a one-piece design, the thrust block may be omitted.
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! The LOCK-RIGHT is designed to be
used with a correct thrust washer under each coupler, and failure
to use this washer is easy to observe during inspection and will
void the warranty.
NOTE: The parts shown in the various figures are typical
and may not exactly depict your particular model.