Pontiac tempest 1968 Service Manual page 519

7F-18 1968 PONT1AC SERVICE MANUAL
CLUTCH HUB REAR
THRUST WASHER .
CLUTCH HUB
F i g . 7F-45 Removing Clutch Hub Rear Thrust Washer
2. Inspect low band surface of clutch drum for
excessive scoring or burning. Check clutch drum
bushing for scoring or excessive wear. If bushing
replacement is necessary, see Clutch Drum Bushing
Replacement below.
3. Check steel ball in clutch drum that acts as a
relief valve. Be sure that it is free to move and that
orifice in front face of drum is open. If check ball is
loose enough to come out, or not loose enough to rat­
tle, replace clutch drum as an assembly. Replace­
ment or restaking of ball should not be attempted.
NOTE: When drum is rotating at high speed with
enough fluid trapped in piston apply area, centri­
fugal force acting on fluid could partially apply
the piston and burn clutch pack unless the relief
orifice is open
Q
During normal piston application,
F O R W A R D CLUTCH
H U B
oil pressure seats the ball and prevents loss of
pressure.
4 . • Check fit of low sun gear and flange assembly
in drum slots. There should be no appreciable radial
play. Inspect low sun gear for damage and bushing
for wear.
5. Check clutch plates for burning, pitting or
metal pick-up. Also, check to see that faced plates
are a free fit over clutch hub and that steel plates
are a free fit in clutch drum slots. Check for ex­
cessive wear on friction facing of drive plates.
Examine condition of clutch hub splines and mating
splines on faced plates.
CLUTCH HUB
F R O N T THRUST
W A S H E R \
Figo 7 F - 4 7 Removing Clutch Hub Front Thrust Washer
J 9542
\
F i g . 7 F - 4 6 Removing C l u t c h Hub
F i g . 7F-48 Compressing Forward Piston Return Springs