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PART 7-2-
C4 AUTOMATIC
TRANSMISSION
7-69
CONTROL VALVE BODY
Disassembly
When the main control is dis-
assembled and the valve body-
to-screen gasket is removed the
gasket should not be cleaned in
a degreaser, solyent or any type
of detergent solution. To clean
the gasket, wipe it off with a
lint-free cloth.
1. Remove
the
eight
screws
that
attach
the
oil
screen
to the body and
remove the
screen
and gasket (Fig.
102). Be careful not
to
lose the
throttle pressure limit valve and
spring
when
separating
the oil screen
from
the
valve
body.
2.
Remove the nine attaching
screws
from the underside of the
lower
valve
body. Separate the lower
valve
body, gasket,
separator
plate
and hold-down plate (Fig. 67) from
the upper
valve
body. Be careful not
to lose the upper valve body shuttle
valve and
check valve when separat-
ing
the upper and lower valve bodies.
3. Slide the manual valve out of
the
body.
4. Carefully pry the low servo
modulator
valve
retainer from the
body and remove the retainer plug,
spring
and valve from the body.
While working in
the low servo
modulator
valve
bore, pry the down-
shift valve
retainer from the body
and remove the
spring
and downshift
valve
(Fig.
68).
5. Depress the throttle booster
plug and remove the retaining pin.
Remove
the
plug, valve and spring
(and
ball on
250 2V
and 302 2V).
6. Remove the cut-back valve and
transition
valve cover
plate from the
valve body
(Fig.
68).
7.
Remove the cut-back valve from
the body.
8. Remove the transition valve
spring,
transition valve, 2-3 back-out
valve and
spring
from the body.
9. Remove the 1-2 shift valve and
2-3
shift valve
cover plate from the
body.
10.
Remove the 2-3 shift valve,
spring and throttle modulator valve
from the body.
11.
Remove the 1-2 shift valve, D2'
valve and
spring
from the body.
12.
Remove the intermediate servo
retaining pin and remove the inter-
mediate accumulator retainer, valve
and
spring
from the body.
13.
Press the main oil pressure
booster
valve
inward and remove the
retaining pin. Remove the main oil
pressure booster valve, sleeve,
THROTTLE
PRESSURE
LIMIT VALVE
ATTACHING
SCREWS
LOWER
VALVE BODY
02074-A
D207J.A
FIG. 67-
Separating Upper and Lower Valve Bodies
springs, retainer and the main oil
pressure regulator valve.
14.
Remove the line coasting boost
valve retainer from the body and
remove the spring and line coasting
boost valve.
Assembly
1. Place the two shuttle
valves
in
the lower body as
shown
in Fig. 67.
Position the gasket, separator plate
and hold-down plate on the lower
body and install the two attaching
screws. Torque the screws to speci-
fication.
2. Insert the downshift valve
(Fig.
68) into the body with the small
diameter facing inward. Install the
downshift valve spring and retainer.
Insert the low servo modulator
valve,
spring and retainer plug in the body.
Depress the plug and install the
retainer.
3. Place the throttle booster valve
spring (and ball on
250 2V
and
302
2V), valve (small diameter end
into
spring) and plug into the body
(Fig.
68). Depress the
plug and install
the
retaining pin.
4. Place
the spring, 2-3 back-out
valve and
the transition valve and
spring in the body.
5. Place
the cut-back valve in the
body.
6. Secure
the cut-back and the
transition
valve cover plate to the
body with
the two attaching screws.
Torque the
screws to specification.
7.
·
Place
the
throttle
modulator
valve,
spring and 2-3 shift valve in
the body.
8. Place the
springs,
D2
valve and
the 1-2
shift valve in the body.
9. Secure
the
1-2
shift valve and
the 2-3 shift
valve cover plate to
the
body with the
three attaching screws.
Torque
the screws to specification.
10.
Place the
spring, intermediate
servo accumulator
valve and
retainer
in the body. Depress the retainer
and
install the retaining
pin.
11.
Insert
the
line
coasting boost
valve
and
spring in the
body. Depress
the
spring
and
install
the
retainer.
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