Chevrolet 10 Series 1968, Service Manual, Page: 194 / 713

REAR SUSPENSION AND DRIVE LINE 4-25
J-9458
X
J-22804-2
I
F ig . 49—D rive Pinion Flange O il Seal Installation (Lig h t-D u ty)
may be made with flange and pinion in same
relative position.
CA U TIO N : Do not attempt to hammer flange
onto pinion shaft. To do so will damage ring
gear and pinion.
13. Pack the cavity between end of pinion splines and
pinion flange with a non-hardening sealer (such as
Permatex Type A) prior to installing nut on pinion.
14. Install a new self-locking washer face type nut on
pinion shaft. Tighten nut to remove end play and con­
tinue alternately tightening in small increments and
checking preload with torque wrench until it is the
same as that recorded in Step 4.
15. Reassemble the rear universal joint, and torque
bolt nuts to specifications.
16. Lower vehicle to floor and road test for leaks.
Positraction Differential Unit
The optionally available Positraction differential unit is
installed in the conventional carrier to replace the stand­
ard differential unit.
Service procedures for the Positraction equipped axle
are the same as on a conventional axle except for the "on
the vehicle check” .
Fig . 51—Pinion Flange Installation
On the Vehicle Check
If vehicle is equipped with a manual transmission,
shift transmission into neutral.
1. Raise rear of vehicle until wheels are off the ground,
remove one wheel and tire assembly.
2. Attach Adapter J-5748 to axle shaft flange and install
a l/2"-13 bolt into adapter (fig. 52).
3. With wheel and tire assembly still on vehicle held
firm ly to prevent turning, measure torque required
to rotate opposite axle shaft with a 0-150 lb. torque
wrench attached to J-5748. Torque should be 70 ft.
lbs. minimum new, and no less than 40 ft. lbs. if
used.
5200 THROUGH 17000 LB CAPACITY AXLE
Axle Assembly
Service operations on these axle assemblies may be
performed with the housing installed in the vehicle or
with the housing installed in a holding fixture. There may
be occasions, however, when it will be necessary to re­
move the complete housing assembly. The following axle
assembly removal and installation procedure, therefore,
is necessary only when housing replacement is required.
Rem oval
1. Raise vehicle, place stand jacks under frame side
rails, and remove rear wheels.
2. Remove two trunnion bearings
“ U”
bolts from the
J-22804-1
J-21057
Fig. 50 —Drive Pinion Flange O il Seal Installation (H e avy-D u ty)
F ig . 52—Measuring Positraction Rotating Torque
CHEVROLET TRUCK SERVICE MANUAL