OISASSEMBL Y -- CHASSIS
B. Backlash (Total Amount)
Backlash, or gear lash is the amount of move-
ment of one gear relative to the other, measured with
one gear stationary.
the amount of backlash is out of the standard range,
replace the shim(s)
of the ring gear and check the
backlash as described below. Repeat if necessary.
1. For final gear case cover shim replacement,
see "Ring Gear" (Pg. 151).
2. Sh ims
are available in the sizes shown in the table.
Shim Sizes for Ring Gear
Correct Tooth Contact Pattern
3. If the shim(s)
thickness is to be increased by 0.1
mm, the backlash will be increased by about 0.075
Oppositely, when the shim thickness is de-
creased by 0.1 mm, backlash will be decreased by
about 0.075 mm. So the following formula can be
used to estimate the most desirable shim(s) thick-
ness from the present shim(s), when the backlash is
out of the standard range.
B + 1.3 x (0.22
Backlash when present shims are installed
Tooth Contact Adjustment
1. Check to see that there is no dirt
on the gear teeth.
2. Special compounds are available from automotive
the purpose of checking differential
gear tooth patterns and contact. Use one of these
checking the bevel gears
The checking compound must be smooth and firm,
with the consistency of tooth paste.
Using a paint brush, apply a thin layer to the teeth
thickly, the exact tooth pattern may
.Apply checking compound to 4 or 5 teeth of the
A. Ring Nut Wrench (57001·1051)
B. Pinion Joint Holder (57001-1050)