Adjusting Backlash - Winnebago 1987-1989 LeSharo Service Manual

FINAL DRIVE REBUILD
REASSEMBLY
ADJUSTING BACKLASH
Backlash cannot be measured after the gearbox is
assembled. It must be adjusted when the differential
bearings are mounted.
A
B
(86 mm)
Ie
I
i
I
j
: "I
PROCEDURE
Assemble the differential housing and ring gear
using 3 bolts.
Use an accurate calipers to measure dimension A,
the distance between bearing thrust surfaces on
the differential gear assembly. Record this
dimension.
Subtract B (86 mm for all differentials) from
dimension A. The result is dimension C.
Example: If A is 93 mm, then 93 - 86 = 7 mm
- Subtract dimension C from D (7.93 mm for all
differentials) to determine dimension X, which is
the proper backlash adjustment.
Example: 7.93 - 7 = .93 mm backlash
- Select a shim to use between the bearing and
differential housing, which adjusts backlash
closest to dimension X.
- Three thicknesses of shims are available:
- 0.8
mm
- 1.0
mm
• 1.2
mm
In our example, you would choose the 1 mm shim,
which would be only .07 mm over .93 mm. The .8
mm shim would be .13 mm too close.
- Place the proper shim between the bearing and
differential housing.
- Fit the bearings usings a press.
The larger bearing goes on the ring gear end of
the differential assembly.
Mount the ring gear to the differential housing using
new bolts.
Torque tighten the ring gear bolts.
F7-17
(7.93 mm)