Chevrolet 1980 Light Duty Truck Repair Manual page 104

4B-36 REAR AXLE DIFFERENTIAL
D iffe re n tia l Disassem bly
1. Check differential case to make sure that the two
halves are marked so they may be reassembled in same
relation. See figure 6G.
2. R em ove bolts holding case and cover together. Ring
gear is m ounted on the case.
3. Separate cover from case and remove differential side
gears and thrust washers, pinion gears with thrust washers
and differential spider.
D iffe re n tia l Inspection
1. W ash all parts thoroughly in cleaning solvent.
2. Inspect ring gear for chipped, scored or worn teeth.
3. Check radial clearance between differential side
gears and differential case, also fit o f differential pinions on
spider.
4. Inspect spider arms for wear and distortion.
5. Inspect splines and teeth o f differential side gears and
pinions for chipping or excessive wear.
6. Check thrust washers for wear and replace if even
slight wear is indicated.
Fig. 6 G -D iffe re n tia l Case Line-Up M arks
O V E RH AU L M A N U A L
Fig. 7G ~D ifferentia! Bearing Removal
7. Check differential side bearings and cups for broken
races, discoloration or roughness.
8. Inspect differential case for cracks or distortion.
Ring G ear R ep lacem ent
1. R em ove ring gear from case by tapping the back o f
the gear with a soft faced hammer.
2. Inspect ring gear pilot case flange and back o f ring
gear for dirt or burrs.
3. Install two guide pins (m ade from cap screws with
heads cut o ff and ends slotted) to new gear diam etrically
opposite each other.
4. Start guide pins through case flange and tap ring gear
on case.
D iffe re n tia l Bearing R ep lacem ent
1. Install T ool J -8 107 m aking sure puller legs are fitted
securely in notches in case and tighten retaining yoke as
shown in figure 7G.
2. Tighten puller screw to rem ove bearing.
Place new bearing on hub with thick side o f inner
3.
race toward case and install bearing using J -1488 as shown
in figure 8G.
The side bearing tool is counterbored and has pilot to
assure proper installation and seating o f bearing.
D iffe re n tia l Reassem bly
1. Lubricate differential side gears, pinions and thrust
washers.
2. Place differential pinions and thrust washers on
spider.
A ssem ble side gears and pinions and thrust washers
3.
to left half o f differential case.
4. A ssem ble right half o f case to left h alf being sure to
line up marks on the tw o halves.
5. Install differential to-ring bolts and lock washers and
tighten evenly - until ring gear is flush with case flange.
6. R em ove tw o guide pins and install remaining two
bolts. Torque all bolts
specifications.
alternately and evenly to