Chevrolet 1977 10 Series, Руководство по ремонту, Страница: 103 / 468

REAR AXLE DIFFERENTIAL 4B-31
Fig. 11C—In s ta llin g D iffe re n tia l Shim
EX A M PLE:
G auge thickness (h ig h e r r e a d in g ) ................. 226"
Service spacer u sed ...............................m inus .170"
D iffe re n c e ....................................056"
F o r p re lo a d .................................................add .008"
Service shim siz e .................................................. 064"
N O T E : Service shim s are a v a ila b le in
increm ents o f .002 in .—i f the shim m easure­
m ent falls between the availab le shim s, select
a shim th in n er by .001 inch.
15. Install the selected shim betw een the service spacer
and bearing, using a soft face h am m er. See F igure
11C.
16. Install the right b ea rin g cap and torque both
b earin g caps to specifications.
17. M ount a dial indicator on the c a rrie r and check
backlash between the rin g g e a r and pinion, as
shown in Figure 12C. Backlash should be w ithin the
ran g e o f .003" to .010" w ith a re a d in g o f .005"
*o
Fig. 12C—Checking Backlash
Fig. 13C—Checking Ring Gear Runout
.008" p re fe rred . Check re a d in g at fo u r equally
spaced positions a ro u n d the rin g gear. V aria tio n in
re a d in g should not exceed .003".
N O TE: Position the d ial in d ic a to r so th a t
in d icato r button is p e rp e n d ic u la r to tooth
angle and in line w ith g e a r ro ta tio n .
18. If v a riatio n in backlash exceeds .003", m easure rin g
g e a r and case ru n o u t as show n in F ig u re 13C. G e a r
ru n o u t should not exceed .003"; should ru n o u t
exceed this lim it, check rin g g e a r an d case fo r
d efo rm a tio n a n d /o r fo reig n m a tte r betw een case
and gear.
19. If g ear lash is not w ith in lim its, correct by
d e c re a sin g shim th ick n e ss on o n e side a n d
increasing thickness o f the o th e r shim the sam e
am ount. T otal shim thickness m ust be m a in ta in e d
to m ain ta in p ro p e r p relo ad .
EX A M PL E : By d ec reasin g shim on the rig h t
side .003" a n d in creasin g shim thickness on
the left side by .003", backlash will decrease
by .002".
DRIVE PINION
Removal
1. Rem ove differential case as previously outlined.
2. Check p in io n b e a rin g p re lo a d as described u n d er
"D riv e P inion - In stallatio n an d A d ju stm en t". If
there is no p relo ad read in g , check fo r looseness o f
p in io n assem bly by sh ak in g the c o m p an io n flange.
L ooseness
in d ic a te s th e n e e d fo r b e a rin g
replacem ent.
3. T urn holding fixture over a n d install H o ld er J-8614-
11 on flange by using two bolts w ith flat w ashers, as
shown in figure 14C. P osition J-8614-11 on flange so
th at the fo u r notches are tow ard the flange.