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DIFFERENTIAL
48-1 5
Fig. 48-27 Removing Pinion Nut
Fig. 48-28 Removing Companion Flange
ASSEMBLY A N D INSTALLATION
OF DIFFERENTIAL CASE
ASSEMBLY
Before installation of any parts, examine the wearing
surfaces of all parts for scoring or unusual wear. Make certain
that the interior of the carrier housing is absolutely clean and
dry. Also make certain that the parts to be assembled are
absolutely clean and that there are no burred edges. Lubricate
all parts with the specified rear axle lubricant just before
assembly.
If the ring gear and pinion are changed, only factory
hypoid lubricant should be used for filling because of its
special anti-scoring properties. For this reason, the proper
lubricant is included in the carton with the replacement gears
as received.
Fig. 48-29 Removing Rear Pinion Bearing
INSTALL PINION BEARING OUTER
RACES I N CARRIER
1. If rear pinion bearing race is to be replaced,, use
Installer J 861 1-01 on 6 1/2" ring gear axles, J 78 18 on 7-1/2"
ring gear axles or J 8608 on 8-1/2" or 8-3/4" ring gear axles
with Driver Handle J 8092 (Fig. 4B-30).
Fig. 4B-30 Installing Rear Pinion Bearing Outer Race
2. If front pinion bearing race is to be replaced, install
new outer race using Installer J 7817 on 6 1/2" and 7 1/2"
ring gear axles and Installer J 861 1-01 on 8 1/2" and 8 3/4"
ring gear axles with Driver Handle J 8092 (Fig. 4B-31).
SET PINION DEPTH
Ring and pinion gear sets are matched in a special test
machine which permits adjustment of pinion depth in ring
gear until a point is reached where best operation and proper
tooth contact under load is obtained. At this point, the setting
of the pinion with reference to the centerline of the ring gear
is indicated by the machine. This setting may vary slightly
from the design or "nominal" setting due to allowable
variation in machining the parts. However, most production
pinions and all pinions used for service replacement are zero
or nominal pinions.
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