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PART 7-1 AUTOMATIC TRANSMISSION (Borg-Warner)
7-31
22. Withdraw the parking pawl
actuating mechanism (Fig. 34) after
removing
the
spring
clip
and
washer. Careful note should
be
made of the manner in
which
the
spring is fitted before removal
since
when
removed the assembly
will
disengage.
23.
From m•tside the
case drive
out the tension
pin
retaining
one
parking
pawl pivot pin
and drive
out the
pivot pin from inside
the
case.
The second pivot
pin is not
secured but is retained by
a lug on
the
extension housing.
If
the case
is upended and gently tapped
this
pin
will
fall
out
and
the parking
pawl can be removed.
FIG. 34- Manual Valve
Lever
14.
Remove
the
locknut from the
rear band adjuster and screw the
adjuster screw into the case to re-
move iL
THE SUB-ASSEMBLIES
FRONT PUMP
TO DISMANTLE:
Remove
the
five
bolts,
one
cheese-head
screw
and
spring
washer
to separate the pump
body
from the pump adaptor.
Mark
both
inner and outer gears
to
en-
sure that when reassembled
to gear
faces are replaced in the same posi-
tion as removed
.
Remove both
gears.
Remove the
sealing
ring
from around
the
periphery
of
the
pump body
(Fig.
36). Carefully
clean
and inspect each
part for
signs
of
wear,
paying
particular
attention
to the whitt: metal bear-
ings
in the pump body,
adaptor
and
driving gear. If
necessary, remove
the
seal from
the
pump
body.
TO REASSEMBLE:
If removed,
replace
the
seal
in
the pump body. Replace the driv-
ing and driven gears in the pump
body, noting the marks made when
dismantling, see above, and lightly
lubricate with transmission fluid.
Fit a new sealing ring around the
periphery
of
the
pump
body.
Position the pump body on the
pump adaptor, lining up the hole
in the pump body segment with the
corresponding hole in the pump
adaptor. Secure the pump body to
the pump adaptor with five bolts,
and lockwashers and one cheese-
head screw and lockwasher.
FRONT CLUTCH AND INPUT
SHAFT ASSEMBLY
To Dismantle:
With the aid of a screwdriver
remove the circlip retaining the in-
put shaft to the clutch cylinder.
Then withdraw the input shaft and
thrust washer.
Remove the clutch
plates, noting their positions.
An
internally toothed plate should be
the
first plate viewed when the in-
put
shaft is
removed and the thick
externally splined pressure plate
the last, the plates alternating. Re-
move the clutch inner hub which
will reveal a further large circlip
retaining the diaphragm spring and
piston.
Remove this circlip and
spring. To remove the piston, it is
neces~ary
to blank off one end of
the
clutch
cylinder piston guide
and
apply
air pressure, via a suit-
able
adaptor. at the other end of
the guide.
The outer face of the
pistl'n
has a
steel
ring. pressed into
it.
Remove the rubber sealing
ring from the outer periphery of the
FIG. 35 - RefiHing Front
Clutch Piston
piston and also the
seal
from the
piston guide in the clutch cylinder.
To Reassemble (Fig. 37)
Thoroughly clean and inspect
all parts and lubricate with trans-
mission fluid prior to
assembly.
Replace the rubber seals around
the periphery of the piston and the
piston guide. Refit the piston, us-
ing Tool No. B.W. 42 (Fig. 36) en-
suring that the steel pressure ring
on the outer face of the piston is
correctly seated.
Reposition the
spring with the fingers resting on
the steel pressure ring of the piston
and secure with the large circlip.
Refit the thick externally splined
pressure plate, with the plain face
outwards and alternatively inter-
nally and externally splined clutch
plate, ending with the internally
splined plate.
The front clutch
externally toothed plates are flat,
whereas those for the rear clutch
are slightly dished.
Replace the
central hub and thrust washer.
Reposition the input shaft and se-
cure with a large circlip.
REAR CLUTCH AND FORWARD
SUN GEAR ASSEMBLY
To Dismantle:
Carefully remove the three scal-
ing rings, two from the front
end
and one from the rear end of the
forward sun gear shaft. Withdraw
the forward sun gear shaft from
the rear clutch assembly.
Re-
move the large circlip retaining the
clutch plates, with the aid of a
screwdriver.
Remove the thick
externally splined spacer plate and
the alternative internally and
ex-
ternally splined plates. Locate the
clutch spring compressor on the
clutch spring retaining plate so that
the ends of the circlip are opposite
the latge
"window"
in the tool
(Fig.
38). Place the assembly in a
press and press down onto the tool
to compress the spring. Using cir-
clip pliers, remove the circlip and
release the press until the spring is
fully released and then remove
from the press. Remove the spring
and spring seat.
To remove the
piston, apply air pressure to the
hole in the groove next to the seal-
ing ring closest to the front drum.
Remove the rubber sealing rings
from around the periphery of the
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