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AUTOMATIC TRANSMISSION
21-121
OVERDRIVE GEARTRAIN DISASSEMBLY
WARNING: THE FIRST STEP IN GEARTRAIN DISAS-
SEMBLY INVOLVES COMPRESSING THE DIRECT
CLUTCH SPRING. BECAUSE THE SPRING E X E R T S
OVER 800 POUNDS FORCE ON THE SLIDING HUB,
IT
IS EXTREMELY IMPORTANT THAT PROPER
EQUIPMENT
BE
USED
FOR
THIS
PURPOSE.
SPRING
COMPRESSOR
TOOL
C-6227-1 AND
A
SHOP
PRESS
WITH A
MINIMUM PRESS
RAM
TRAVEL OF THREE INCHES ARE REQUIRED TO
COMPRESS THE SPRING SAFELY. SPRING TEN-
SION MUST ALSO BE RELEASED SLOWLY
AND
COMPLETELY TO AVOID PERSONAL INJURY. DO
NOT ATTEMPT TO COMPRESS THE SPRING WITH
ANYTHING OTHER THAN THE COMPRESSOR TOOL
AND SHOP PRESS.
(1) M o u n t t h e g e a r t r a i n assembly i n a shop press
w i t h t h e output shaft facing downward. Position t h e
o u t p u t shaft i n a f i x t u r e t h a t w i l l support t h e o u t p u t
shaft flange.
(2) W i t h t h e g e a r t r a i n assembly properly supported
i n t h e press, i n s t a l l spring compressor tool C-6227-1
i n t h e sliding h u b (Fig. 20).
Fig. 20 Installing Clutch Spring Compressor Tool
(3) A l i g n t h e press r a m w i t h t h e compressor tool
a n d have a helper operate t h e press t o compress t h e
direct clutch spring.
(4) When t h e spring a n d h u b are compressed, r e -
move the large load r e t a i n i n g r i n g ( F i g . 21) a n d t h e
s m a l l load r e t a i n i n g safety r i n g ( F i g . 22).
(5) Release t h e press load o n t h e clutch s p r i n g
s l o w l y .
Then
remove
t h e compressor
tool a n d
g e a r t r a i n from t h e press.
(6) Remove t h e s l i d i n g h u b a n d direct clutch pack
as a n assembly (Fig. 23).
(7) Remove direct clutch spring, s u n gear a n d
c l u t c h spring t h r u s t plate, needle t h r u s t bearing, a n d
planetary gear assembly (Fig. 24).
Fig. 22 Removing Safety Ring From Sun Gear
HUB
8 9 2 1 - 2 4 6
Fig. 23 Removing Sliding Hub And Direct Clutch
Pack
(8) T u r n the output shaft over.
(9) Remove the overrunning clutch as a n assembly
w i t h expanding snap r i n g pliers (Fig. 25). Reach into
the inner splines of the clutch and engage t h e pliers.
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