Chevrolet 1977 10 Series, Repair Manual, Page: 257 / 468

AUTOMATIC TRANSMISSION (200J7A-21
INPUT
DRUM
Fig. 7 A - 8 4 A - l n s t a l l i n g I n p u t Dr um and Rear Sun Gear
IN P U T D R U M R EA R SUN G EAR
(IN P U T D R U M TO (D R U M TO H O U S IN G )
REA R SUN G EAR)
Fig. 7 A - 8 5 A ~ R e a r Sun Gear and I n p u t Drum
4. Inspect input drum for damage.
5. Inspect 4 tanged input drum to low and reverse
clutch housing thrust washer for scoring or distorted tangs.
6. If damaged, replace rear sun gear to input drum snap
ring.
Fig. 7 A - 8 7 A - F r o n t Sun Gear I d e n t if ic a t io n
Reassembly
1. Install rear sun gear into input drum , spline side first,
and retain with snap ring.
2. Install 4 tanged thrust washer on input drum over
sun gear end; align tangs into input drum and retain with
petrolatum (Fig. 7A-86A).
3. Install rear sun gear and input drum assembly (Fig.
7A-84A).
Front Sun Gear
1. Inspect front sun gear splines and teeth for damage
or wear.
2. Inspect machined face for pitting, scoring or damage.
3. Install front sun gear face with the identification
m ark (a drill spot or groove) against input drum to rear sun
gear snap ring (Fig. 7A-87A and 7A-88A).
4. Thoroughly clean, air dry and inspect front sun gear
to front carrier thrust race and thrust bearing for pitted or
rough conditions.
5. Install front sun gear to front carrier thrust bearing
and race assembly with roller thrust bearing against the
front sun gear (Fig. 7A-89A).
NOTE:
This thrust bearing requires only 1 thrust race.
THRUST
WASHER
INPUT
DRUM
REAR SUN
GEAR
'FRONT SUN
GEAR
Fig. 7A-86A--lnstalling Thrust Washer
Fig. 7 A -8 8 A -ln s ta llin g Front Sun Gear