Reassembly of Differential and Carrier (CONT)

7. Tighten bearing adjusting nuts to adjust bearings to

zero end play (Fig. 125). This condition may be

checked with screwdriver as shown (Fig. 126). All

bearing rollers must rotate as ring gear rotates, but it

should not be possible to move bearing rollers

sideways in cage when prying against them with

screwdriver.

FIG. 127

9. Check ring and pinion gear for proper tooth contact.

Paint ring gear with a mixture of red lead and linseed

oil (Fig. 128). When ring and pinion gears are

rotated, the red lead is squeezed away by the contact

of the teeth, leaving bare areas the exact size, shape

and location of the contacts. As a rule, painting about

10 or 12 teeth is sufficient for checking purposes.

FIG. 125

FIG. 128

Sharper impressions may be obtained by applying a

small amount of resistance to the ring gear with a flat

steel bar and using a wrench to rotate the pinion.

Gears should be rotated, under slight load, until ring

gear has turned at least one revolution in both

FIG. 126

directions.

8. Use a dial indicator to check backlash between ring

Check tooth contact pattern on drive side (convex

gear and pinion shaft gear. Backlash is adjusted by

side) of ring gear teeth. Coast side will automatically

moving ring gear toward or away from pinion shaft

correct when drive side pattern is correct. Refer to

gear as shown in Fig. 127. Move ring gear by

gear tooth contact chart (Fig. 129). If proper tooth

loosening one adjusting nut and tightening opposite

contact pattern is not as shown, readjust backlash or

lock nut. When loosening one lock nut and tightening

add to or subtract from shim pack between bearing

opposite, move each lock nut same distance so that

cage flange and differential housing. Addition of or

bearing adjustment made in previous paragraph is not

subtraction of shims should be made in small

disturbed. Adjust position until gear backlash is

increments until proper contact is established. Split

between .010" and .014" if new gear set is used, or

shims are provided to permit removal or insertion

adjust to backlash noted at disassembly for old gears.

between bearing cage and differential housing.