Power-Lok Differential; Inspection - Chevrolet 1973 Overhaul Manual

POWER-LOK DIFFERENTIAL

The Power-Lok differential shown in Figure 17D is a
unit which is installed as optional equipment in place of
the standard differential. The locking differential permits
the major driving force to be transmitted to the wheel
with better traction. This means that the vehicle can be
operated on ice, snow, sand or under other adverse
conditions with a minimum amount of slippage through
one wheel.
Disassembly
1. Remove differential bearing cups and tag for
reassembly reference.
2. Remove differential bearing cones, using Puller
Tool J-22888.
3. Tag each bearing cone and shim for reassembly
reference, as they should be replaced in their
original locations.
4. Scribe mark on both halves of differential so they
can be reassembled in their original locations.
5. Remove eight bolts attaching two halves of case
together.
6. Separate plain half of differential case from
flanged half.
1. D ifferen tial C a s e B o lt
2. D ifferen tial
C a s e - P la in H alf
3. D ifferential
C a s e - F la n g e d H alf
Friction P la t e -T a b b e d
4.
(B elleville)
Friction D is c -T o o t h e d
5.
(B elleville)
Fig. 17D—Power-Lok D ifferential
REAR AXLE DIFFERENTIA L CARRIER
7. Remove five plates and discs from side gear ring.
NOTE: A series of clutch plates and dished
(Belleville) friction plates on each side of
differential side gears transmits drive from
differential case to axle shafts. Carefully
observe the order in which the plates are
used, since they must be replaced in the same
order. Refer to Figure 17D.
8. Remove side gear ring and side gear.
9. Remove two cross shafts and pinion gears.
10. Remove side gear, side gear ring, and five plates
and discs from the opposite side. Observe the order
in which the plates are used.

Inspection

1. Inspect cross shafts and pinions for scoring, wear,
pitting, etc. If the center lands of either cross shaft
show signs of wear, examine ends of axle shafts to
determine if the axle shaft is rubbing against cross
shaft. This rubbing condition may cause a whine or
howl that is similar to a pinion bearing noise, at 40
to 50 MPH. This condition can be corrected by
grinding 1/32" off the end of the axle shaft.
: iibo
,
Friction P la t e -T a b b e d
(Flat)
Friction D is c -T o o t h e d
(Flat)
4 -4 5
8. S id e G e a r R in g
9. S id e G e a r
10. P in io n G e a r s
11. C r o s s S h a f ts
OVERHAUL MANUAL