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PART 7-2- C4 AUTOMATIC TRANSMISSION
7-67
COVER SEAL
SERVO PISTON STEM
PISTON RETURN SPRING
PISTON AND SEAL
(SEAL BONDED TO PISTON)
COVER
01401-A
FIG. 58 - Low·Reverse Servo
Disassembled
FIG. 59 - Removing
or
Installing
Low-Reverse Servo Piston
These instructions
are
given here to
avoid unnecessary repetition.
Handle all transmission parts
carefully to avoid nicking or burring
the bearing or mating surfaces.
Lubricate all internal parts of the
transmission before assembly with
clean automatic transmission fluid.
Do not
use
any other lubricants
except on gaskets and thrust washers
which mav be coated with vaseline
to facilitate assembly. Always
install
new gaskets when
assembling the
transmission.
Tighten all bolts and
screws to
the
recommended
torque outlined
in the Specification Section.
FIG. 60 - Intermediate Servo
Disassembled
FIG. 61 - Removing Intermediate
Servo Piston
TRANSMISSION CASE AND
LINKAGE REPAIR
Low-Reverse Servo
1. Remove the four servo cover
to case attaching bolts.
2. Remove the servo cover, cover
seal,
servo
piston and piston return
spring from the case (Fig. 58).
3. The servo piston seal is bonded
to the piston. If the seal has to be
replaced, replace the piston as-
.
sembly which includes the seal. Dis-
assemble the servo piston from the
piston rod by inserting a small
screwdriver in the hole of the piston
rod and removing the piston attach-
ing nut (Fig. 59). Position the
spacer
on
the piston stem if
it
was previ-
ously removed. Install the new
servo
piston and torque the piston attach-
ing
nut to specification.
4. Place the piston return
spring
in
the
servo
bore of
the
case.
Lubricate the piston
seal
with
clean
transmission fluid
and install
the
servo
piston
(Fig.
58).
5. Place
a
new
cover seal on the
cover
and install
the
servo
cover.
Install the four cover
attaching
bolts. Torque the cover to case re-
taining bolts to
specification.
Intermediate Servo Repair
1. Remove the
four servo cover-
to-case attaching
bolts.
2. Remove the
servo cover, gas-
ket,
servo
piston,
and
piston return
spring
from the case
(Fig.
60).
3. Remove the intermediate servo
piston from
the
cover
(Fig.
61).
4. Remove the
seal
rings from
the servo piston
and cover.
5. Install
a
new
seal on the cover
and servo piston. Lubricate
the
seals
with clean
transmission oil.
Install the piston
into the cover.
Be
careful
not to damage
the piston
seal.
6. Install the piston return
spring
in the
servo
bore
of
the
case.
7. Place a new
gasket on
the
servo
cover. Position the
servo
piston and cover
assembly into
the
case making
sure
that the
slot is in
a
horizontal position to
engage
the
strut.
Use two
1
"s-18
bolts, 1
~
inch
long,
180°
apart,
to position
the
cover
against the
case.
Install
two
cover
attaching
bolts. Remove the
two I
i
inch bolts
and
install
the
other two
cover attaching
bolts.
Torque the
attaching
bolts to
specification.
Downshift and Manual Linkage
I. Remove the downshift
outer
lever
attaching
nut. Remove
the
down~hift
outer and inner
levers.
From
inside the transmission
case.
remove the upper retaining ring
and
flat washer from the manual lever
link (Fig. 64). Remove
the
upper
end of the lever link
from the case
retaining pin
2. From
the
back
of
the trans-
mission case, remove the upper
retaining ring
and
flat
washer
from
the parking pawl link (Fig.
62) .
Remove the pawl link from the
case
retaining pin.
3. From the back
of
the trans-
miSSIOn case, remove the parking
pawl link, toggle rod,
and
manual
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