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21 - 82
AUTOMATIC TRANSMISSION
•
SPRING
GUIDESC2)*
SHUTTLE VALVE
CLIP
SHUTTLE
VALVE
SECONDARY
SPRING
1-2 SHIFT VALVE
GOVERNOR PLUG
SHUTTLE VALVE
GOVERNOR PLUG
END PLATE
2-3 SHIFT VALVE
GOVERNOR PLUG
SHUTTLE VALVE PRIMARY SPRING
SHUTTLE VALVE THROTTLE PLUG
SCREWS)
Fig. 19 Shuttle Valve And Governor Plugs
(4) Remove and r e t a i n detent b a l l and s p r i n g (Fig.
15).
(5) Remove t h r o t t l e lever assembly (Fig. 15).
(6) Remove m a n u a l valve, k i c k d o w n valve a n d de-
tent, and t h r o t t l e valve components (Fig. 15).
PU12
SHIFT
VALVES/PRESSURE
REGULATOR
PLUG
REMOVAL
(1) Remove the l i n e pressure end plate and remove
the line pressure p l u g and sleeve a n d t h e t h r o t t l e
pressure p l u g and s p r i n g (Fig. 20).
(2) Remove t h e l i m i t valve end plate a n d l i m i t
valve housing i f equipped (Fig. 20).
(3) Remove the t h r o t t l e p l u g from the housing (Fig.
20).
(4) Slide t h e retainer from the housing and remove
the l i m i t valve and s p r i n g (Fig. 20).
(5) Remove the 1-2 a n d 2-3 shift valves and springs
from the valve body (Fig. 20).
VALVE BODY CLEANING
AND
INSPECTION
Clean t h e valve body components i n clean solvent.
D r y t h e parts w i t h compressed air. M a k e sure a l l
passages are clean and free from obstructions.
Inspect t h e t h r o t t l e a n d m a n u a l valve levers a n d
shafts. D o n o t a t t e m p t t o s t r a i g h t e n a b e n t s h a f t
or c o r r e c t a loose lever. R e p l a c e these c o m p o -
n e n t s i f w o r n , bent, loose o r d a m a g e d i n a n y
w a y .
Inspect a l l o f the valve body m a t i n g surfaces for
scratches, n i c k s , burrs, or distortion. Use a s t r a i g h t -
edge t o check surface flatness. M i n o r scratches m a y
be removed w i t h crocus cloth using only very l i g h t
pressure. M i n o r d i s t o r t i o n o f a m a t i n g surface m a y
be corrected b y smoothing t h e surface w i t h a sheet o f
crocus c l o t h placed on a surface plate (or equally f l a t
surface). I f d i s t o r t i o n is severe or a n y surfaces are
h e a v i l y scored, t h e valve body w i l l have to be r e -
placed.
V e r i f y t h a t the 1-2 shift orifice is clear. Check t h e
orifice b y i n s e r t i n g a .79 m m (1/32 inch) diameter
d r i l l b i t t h r o u g h t h e orifice and i n t o t h e 1-2 shift
bore.
Inspect t h e valves and plugs for scratches, b u r r s ,
nicks, o r scores. M i n o r surface scratches can be r e -
moved w i t h crocus cloth b u t do not r o u n d off the
edges o f the v a l v e o r p l u g lands. M a i n t a i n i n g t h e
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