16-1. GENERAL DESCRIPTION
The two axles, front and rear, are identical as far as the designs of pinion-and-gear drive and differential
gearing are concerned. The major difference in this limited sense lies in the shape of the housing.
Each axle may be regarded as consisting, speaking roughly, of supporting parts (axle sleeves, differential
housing and carrier case) and drive transmitting parts (bevel pinion and gear, differential gearing and
live axle shafts). In the present section, only the bevel pinion and gear and differential gearing are taken
up under the collective title of “differential.”
The bevel gear drive is of hypoid design; pinion and gear have hypoid gear teeth. This means that the
pinion is located slightly below the center of the bevel gear to permit the car body to be lowered in design,
and that some wiping or sliding action occurs in tooth meshing between pinion and gear. Here lies the
reason why use of hypoid gear oil is specified for the differential.
Four differential pinions are used in the differential case to qualify this gearing for heavy-duty “differen-
tial” drive. Thus, a total of 8 gears-a drive pinion, a crown gear, two side gears and four pinions-are
inside the differential housing, all mounted on the differential carrier case bolted to the housing.
This differential is so constructed that the bevel pinion bearing preload is adjusted by tightening the bevel
pinion nut to compress the spacer.
1. Oil seal
2. Bearing
3. Carrier
4. Joint flange
5. Bearing preload
adjusting spacer
6. Shim
7.
Bearing
8. Bearing adjuster
9. Side bearing
10. Adjuster lock plate
11. Bevel gear pinion set
12. Bolt
13. Rear axle housing
14. Front axle housing
15. Bolt
16. Oil level plug
17. Gasket
18.
Oil drain plug
19.
Right case
20. Thrust washer
21.
Joint
22. Thrust washer
23. Pinion shaft No. 2
24. Pinion shaft No. 1
25.
Side gear set
26.
Left case
16-2
Fig. 16-1
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