Installing Differential And G E A R - GMC 1982 Light Duty Truck Service Manual

4 B 5 - 1 2 R EAR A X L E
Fig. 4B5-22--Align Marks
2. Insert checking tool (m ade from splined axle shaft end)
into differentjal nest. Allow splines of tool to engage
with spline of one side gear only (Fig. 4B5-23).
3. Using a suitable socket and torque wrench, rotate
differential nest while observing scale on torque wrench
(Fig. 4B5-24).
Correct rolling resistance of differential assembly is 50
lb. ft. torque maximum applied to one side gear. This
applies to all differential assemblies.
A suitable checking tool can be made by cutting an axle
shaft to an appropriate length and welding a nut on the
end to accept a wrench socket (Fig. 4B5-25).
install Bearing Cups
1. T em po rarily install
adjusting rings w here employed and bearing caps.
Tighten the capscrews to the proper torque.
2. The bearing cups must be of a hand push fit in the
bores, otherwise the bores must be reworked with a
Fig. 4B5-23--lnstalling Tool
the bearing cups, threaded
Fig. 4B5-24~Checking Torque
scraper or some emery cloth until a hand push fit is
obtained. Use a blued bearing cup as a gage and check
the fits as work progresses. Once the cups fit properly,
remove the bearing caps (Fig. 4B5-26).
Installing D ifferen tial and G e a r
1. A fter checking related parts, coat the differential
bearing cones and cups with specified rear axle
lubricant.
2. Place the bearing cups over the assembled differential
bearing cones, then position the differential assembly in
the carrier.
3. Insert bearing adjusting nuts and turn hand -tig ht
against bearing cups.
4. Install bearing caps in the correct location as marked
and tap lightly into position.
If bearing caps do not position properly, adjusting nuts
may be cross threaded. Remove caps and reposition the
adjusting nuts (Fig. 4B5-27). Forcing caps into position
will result in irreparable dam age to the carrier housing
or bearing caps.
Fig. 4B5-25--Checking Tool