Reassembly, Adjustment, and Installation

tubing about three feet long through differential center to

Note. Several adjustments of both

aid manipulation during assembly.

Position axle

pinion and ring gear setting may be

housings (61) on differential housing studs. Place

necessary in the following procedure

tapered bushings (58) on studs and install nuts (55) and

before the exact thickness of gaskets

washers (56 and 57).

to be added, removed, or exchanged

(4) Turn ring gear by hand, testing for noticeable

at any stage. This is determined by

drag due to preload condition of differential bearings. If

trial and error.

no drag exists, remove gaskets (62 or 63) and repeat

test until drag is noticed. Gasket (62) is 0.005 inch

(13) Apply a thin coating of red lead to drive fce

thick, and gasket (63) is 0.0075 inch thick. Decrease

of ring gear teeth, and install axle on transmission with

total gasket thickness in 0.0025 inch steps by removing

gaskets used in step (8) above.

two 0.005 inch gaskets and adding one 0.0075 inch

(14) Remove access plate (14, fig. 7-8) from

gasket.

bottom of transmission.

(5) If drag is noticeable on first trial, reverse

(15) Engage spur gear (25) with a pry bar, and turn

procedure for decreasing gasket thickness in step (4)

it until differential has made one revolution in the

above until no drag is present, then decrease total

forward direction.

gasket thickness until drag is felt. Preload will now be

(16) Remove transmission from axle. Examine

between 0. 000 inch and 0. 003 inch.

teeth of ring gear, and compare marks in red lead from

(6) Press bearings (54) and retainers (53) onto

pinion gear contact with examples shown in

axle shafts. Positioning differential with rod (see step

figure 8-3.

(3) above), enter splines of one axle shaft into side gear

(67) and install bearing retainer (49). Steady differential

Note. Ring gear is on left side of

assembly by hand and repeat installation for other axle

pinion when installed. References to

shaft.

follow will be on this basis.

(7) Check pinion and ring gear backlash

adjustment as follows, before assembling axle reduction

(17) If marks in red lead compare with those

ends to differential section of the axle.

shown in view A, figure 8-3, indicating high, narrow tooth

(8) Temporarily assemble drive axle and gaskets

contact (pinion too far out), adjust by removing one or

(2 and 3, fig. 7-5) to transmission. Remove access

more gaskets (2 or 3, fig. 7-5) to move pinion in

plate (14, fig. 7-8), at bottom of transmission and

direction indicated in box adjacent to view A, figure 8-3.

remove pipe plug (75, fig. 8-1), from bottom of

Transfer one or more gaskets (62 or 63, fig. 8-1) from

differential housing (76).

left side of differential housing to right side. Repeat

(9) Turn output gearshaft (15, fig. 7-8) so one flat

steps (1) through (4) above to check results of

on nut (2) will be horizontal.

adjustment.

(10) Mount a dial indicator on access hole of

transmission to contact downward facing flat on the nut

Note. Do not change total thickness

at a point one inch from center line of shaft.

of gaskets (62 and (63 used; merely

(11) Through hole in differential housing from

change them from one side to the

which pipe plug was removed, insert rod, or long pipe

other as needed, so the differential

plug to hold ring gear locked.

bearing preload will not be changed.

(12) Turn output gearshaft in both directions

through backlash freedom, noting reading on dial

(18) If marks in red lead compare with those in

indicator. Reading of 0.007 inch to 0.017 inch is

view B, figure 8-3, reverse adjustment procedure given

satisfactory.

in step (17) above. Repeat steps ( 13) through (16)

above to check results of adjustment.

(19) Reverse disassembly steps for the rest of the

assembly procedures.

8-4