Powertrax 4120 - Manual (Page 3)

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responsible manner. Be sure to read and understand the driving
information in the LOCK-RIGHT Vehicle Owner’s Manual!
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, thrust washers and
pinion shaft before proceeding.
A word about pinion shafts: Some models of differ-
entials use shafts with circumferential oil grooves for oil distri-
bution, while others use shafts with flats. The shafts with flats
are re-used, while those with grooves are not. If new shafts are
provided in your kit, use them. If no shafts are provided, use the
existing shafts.
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.