1928 Cadillac - GM Heritage Center

102 CADILLAC OPERATOR'S MANUAL
CHAPTER VIII
Rear Axle and Torsion Tube
THE rear axle is of the full floating type. The flanges on the outer ends of
the axle shafts are machined to form 14 teeth which engage recesses cut in
the wheel hub. The inner ends of the shaft are splined to fit the holes in
the differential gears. The ring gear mount, which contains the differential,
is mounted on tapered roller bearings supported by the differential carrier.
The pinion shaft is mounted on ball bearings in the differential carrier.
Except for lubrication as described in Part II, the rear axle requires no
attention. The rear axle gears are correctly adjusted at the factory and no
attempt should be made to readjust them. If attention appears to be required,
a Cadillac service station should be consulted.
The tractive effort of the rear wheels is transmitted to the car through a
torsion tube which encloses the propeller shaft and which is bolted at the
rear end to the differential carrier and at the front end to a ball and socket
joint on the transmission. The torsion tube is trussed by strut rods running
diagonally to the ends of the rear axle housing.
CHAPTER IX
Wheels
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Tire Balancing Marks
The tires are balanced to offset the weight of the valve stem. If a tire is
removed, it must be re-installed in its original position with respect to the
rim; otherwise the tire and wheel will be unbalanced.
A small red square is accordingly branded in the rubber on the side of each
tire. This mark must always be in line with the valve stem.
Tires and Rims
Illustrated directions for removing a rim with tire from a wheel and installing
a rim with tire on a wheel are given in Fig. 22. Directions for removing
a tire from a rim and installing a tire on a rim are given in Fig. 57
Do not under any circumstances attempt to remove a tire from a rim
without deflating the tire.
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