Rear Axles for this vehicle consist of the following components:
• | Differential Axle Housing |
• | Right and left axle tubes |
• | Right and left axle shafts |
These axles are either Full-Floating or Semi-Floating. These axles
can be identified as follows: The Semi-Floating Axle has axle shafts with
C-Clips inside the differential carrier on the inner ends of the axle shafts.
The Full-Floating Axle has bolts at the hub retaining the axle shafts to the
hub assembly. The axles can be identified by the stamping on the right side axle
tube They may also be identified by the ring gear size. The ring gear sizes include
8.60, 9.50, and 10.50 inch axles. The limited slip/locking differential information
for these rear axles can be located in the Rear Drive Axle - Locking Limited Slip
Rear Axle section.
A open differential has a set of four gears. Two are side gears and two are
pinion gears. Some differentials have more than two pinion gears. Each side gear
is splined to an axle shaft so each axle shaft ; so each axle shaft turns when it's
side gear rotates. The pinion gears are mounted on a differential pinion shaft,
and the gears are free to rotate on this shaft. The pinion shaft is fitted into
a bore in the differential case and is at right angles to the axle shafts. Power
is transmitted through the differential as follows: the drive pinion rotates the
ring gear. The ring gear being bolted to the differential case, rotates the case,
The differential pinion, as it rotates the case, forces the pinion gears against
the side gears. When both wheels have equal traction, the pinion gears do not
rotate on the pinion shaft because of input force on the pinion gear is equally
divided between the two side gears. Therefore, the pinion gears revolve with the
pinion shaft, but do not rotate around the shaft itself. The side gears, being splined
to the axle shafts and in mesh with the pinion gears rotate the axle shafts. If
a vehicle were always driven in a straight line, the ring and pinion gears would
be sufficient. The axle shaft could be solidly attached to the ring gear and both
driving wheels would turn at equal speed. However, if it became necessary to turn
a corner, the tires would scuff and slide because the differential allows the
axle shafts to rotate at different speeds. When the vehicle turns a corner, the
inner wheel turns slower than the out wheel and slows it's rear axle side gear (as
the shaft is splined to the side gear). the rear axle pinion gears will roll around
the slowed rear axle side gear, driving the rear axle side gear wheel faster.