GMC 1982 Light Duty Truck Service Manual page 496

4B6-14 REAR AXLE
Complaint
Does n o t lo c k :
L o cks in tu rn s :
N o isy :
N O T E :
In a d d itio n to n o rm a l axle noise (see s e ctio n on s ta n d a rd d iffe r e n tia l) ,
c lu tc h noise u p o n eng age m e nt and disen g ag e m e n t.
R e a ctio n b lo c k s m u s t be re p la ce d w ith b lo c k s o f id e n tic a l th ick n e ss .
D IF F E R E N T IA L D IA G N O S IS
Possible Cause
A . L ittle o r n o s p rin g
p re lo a d on th e la tc h in g
b ra c k e t.
B. F ly w e ig h ts on g o v e rn o r
assem bly s tu c k closed.
C. B ro k e n D rive te e th on
g o v e rn o r a n d /o r cam
gear assem bly.
D. B ro k e n c lu tc h plates
in cam gear asse m b ly.
A . G o v e rn o r assem bly
tig h t in case.
B. B ro k e n o r w eak
g o v e rn o r fly w e ig h t
sp rin g .
C. F ly w e ig h t in g o v e rn o r
assem bly s tu c k o p e n .
D. B ro k e n cam p la te a n d /o r
g o v e rn o r d rive te e th .
A . B ro k e n c lu tc h plates.
B. B ro k e n re a c tio n b lo c k .
C. B ro k e n d iffe r e n tia l
gears.
Fig. 4B6-3H--Diagnosis C hart
Correction
A . R eplace g o v e rn o r assem bly
and la tc h in g b ra c k e t.
B. R eplace g o v e rn o r assem bly and
la tc h in g b ra c k e t.
C. R eplace cam p la te , g o v e rn o r
assem bly a n d la tc h in g b ra c k e t.
D. R eplace c lu tc h p la te s and
w ave sp rin g .
A . Free u p g o v e rn o r a sse m b ly.
B. R eplace g o v e rn o r assem bly
and la tc h in g b ra c k e t.
C. R eplace g o v e rn o r assem bly
and la tc h in g b ra c k e t.
D. R eplace cam p la te , g o v e rn o r
assem bly and la tc h in g b ra c k e t.
th e lo c k in g d iffe r e n tia l e x h ib its som e
A . R eplace c lu tc h p la te s and
wave s p rin g .
B. R eplace re a c tio n b lo c k .* C he ck
c lo s e ly fo r o th e r dam age.
R eplace e n tire u n it if
h o u sin g , side gear, o r p in io n
gears are dam aged.
C. R eplace e n tire u n it.