pinion, spider gears, and pinion yoke or flange
should be installed exactly as they were
removed. If needed. punch mark, label, or scribe
these components so they can be reassembled
Clean all parts carefully and inspect them closely
Rotate the pinion and case bearing by hand while
checking for roughness. Inspect each bearing
and race. Replace the bearing and race as a set if
If the pinion gear has a collapsible spacer (device
for preloading the pinion bearings), always
To avoid seal damage, use a seal driver. Coat the
outside of the seal with a nonhardening sealer.
Lubricate the inside of the seal using the proper
grade of differential fluid. Make sure the seal lip
faces the inside of the differential.
When tightening the pinion yoke nut, clamp the
yoke in a vise or use a special holding bar.
Replace the ring and pinion gears as a set. Mesh
and align the gear timing marks (painted lines or
other markings) on the ring and pinion gears.
This will match the proper teeth that have been
lapped together at the factory.
Torque all fasteners to specifications. Refer to
the service manual for torque values.
Use new gaskets and/or approved sealer.
Align all markings during reassembly. If you
install the carrier caps backwards, for example,
the caps can crush and damage the bearing and
races. The differential could fail soon after it is
returned to service.
Use the service manual for detailed directions.
Differential designs and repair procedures vary.
Special tools and methods are frequently
Differential Measurements and Adjustments
Several measurements and adjustments are made
when assembling a differential. When setting up
(measuring and adjusting) a differential. correct
bearing preloads and gear clearances are extremely
critical. The most important differential measurements
and adjustments (fig. 5-19) include the following:
1. Pinion gear depth
Figure 5-19.Pinion and ring gear adjustments.