Page 459 of 625

7C- 981973 OPEL SERVICE MANUAL
Figure 7C-105Figure
7C-106Installation GT
1. Assemble transmission to suitable jack and raise
into position. Rotate converter to permit coupling
with flywheel in original relationship. Remove hold-
ing fixture.
2. Install tiller tube and converter housing to engine
bolts. Torque to 35
lb.ft.3. Install flywheel to converter bolts. Torque to 30
lb.ft.4. Install detent cable.
5. Connect oil cooler lines.6. Install lower bolt on starter. Torque to 40 lb.ft.
7. Connect modulator line.
8. Connect speedometer cable.
9. Connect shift linkage.
10. Install transmission support.
11. Install drive shaft. Torque U-bolts to 18 lb.ft.
12. Install flywheel cover pan.
13. Reconnect exhaust system and heat shield.
14. Install engine support brackets.
15. Lower car,
16. Install starter bolts, Torque to 40
lb.ft.17.
C:onnect battery.
18. Fill transmission with fluid, as described in
Specifications. Check selector lever and detent cable
adjustment.
DISASSEMBLY, INSPECTION AND REASSEMBLY
Transmission Installation Into Holding FixtureI. Remove transmission tiller tube.
2. With transmission on cradle of portable jack,
remove converter assembly by pulling straight out.
Converter contains a large amount of oil.
3. Install holding fixture, J-8763-01, on transmission.
4. Install holding fixture and transmission into hold-
ing base tool J-3289-20 with bottom pan up. See
Figure
7C-107. Do not overtighten.
Figure
7C-107
Page 461 of 625
7C-1001973 OPEL SERVICE MANUALFigure 7C-1 12
Figure
7C-1 136. Remove the two check balls located in the oil
passages in the transmission case. See Figure
7C-114.Location of these check balls must be noted so that
they are installed correctly.
Removal of Servo PistonThis operation can be performed with transmission
in vehicle
1. Compress servo piston using servo piston com-
pressor tool J-23075.
Figure7C-1 14
2.Using pliers,
remove servo pistonsnap ring.SeeFigure
X-1 15.
Figure
7C-1 153. Loosen servo piston compressor tool J-23075
slowly as servo is under high spring tension. Remove
tool and servo piston assembly. See Figure
7C-116.
Removal of Selector Lever and ShaftNote at this point that the selector lever (on GT
models only) is on the opposite side from all other
models, and that the selector shaft passes through
the case. See Figures 7C-117 and 7C-118. Note also
Page 468 of 625
J-8092
CONVERTERFigure 7C-142
10. Install new converter housing oil seal using tool
J-21359. See Figure
7C-143.12. Mark relative location of oil pump gears and
remove oil pump gears. See Figure
7C-144.AUTOMATIC TRANSMISSION
712.107Figure 7C-144
13. Using compressor tool J-2590-12 with adapter
J-21420-1 on reverse clutch retaining seat, compress
clutch return springs. See Figure
7C-146.14. Remove snap ring using snap ring pliers such as
J- 8059. See Figure
7C-146.Figure 7C-143
Figure 7C-146
11. Check converter pump hub for nicks, burrs or
damage which could have caused oil seal to leak or
have worn bushing. Remove nicks and burrs.15. Loosen compressor tool J-2590-12 and remove
reverse clutch retaining ring and 24 reverse clutch
springs.
Page 469 of 625

712.1081973 OPEL SERVICE MANUALCHSJ
351. RETAINING PIN
72. PRESSURE REGULATOR BOOST VALVE SLEEVE
3. PRESSURE REGVLATOR BOOST VALVE
4. PRESSURE REGULATOR VALVE SPRING SEAT
5. PRESSURE REGULATOR VALVE SPRING
6. PRESSURE REGULATOR VALVE
7. OIL PUMP BODY
8. OIL PUMP PRIMING VALVE, SPRING 8 SPRING SEAT
16. Remove reverse clutch piston.
17. Remove priming valve from oil pump body by
lightly tapping with a drift through the hole at the
rear of oil pump. (Only if diagnosis requires removal
or if excessive dirt has passed through transmission.)
18. Pressure regulator and boost valve may be
removed by using a pari of wire cutters to remove the
retaining pin. Due to the difficulty of removing the
retaining pin, it is not recommended that the pres-
sure regulator valve and boost valve be disassembled
during overhaul, unless it was determined by oil
pressure checks to have been malfunctioning prior to
tear down.
19. Remove pressure regulator boost valve sleeve,
spring, pressure regulator valve and two washers. See
Figure
7C-147.20. Inspect and if necessary replace the oil pump hub
bushing by threading a 3/4” standard pipe tap such
as tool J-23130-5 into bushing. See Figure
7C-148.Figure 7C-148
Page 471 of 625

7C-1101973 OPEL SERVICE MANUALHSEAL
REVERSE CLUTCH
Figure
7C-151Figure 7C-153Figure
7C-15230. Install new oil seals on reverse clutch piston. See
Figure
7C-153.31. Install reverse clutch piston onto rear face of oil
pump using liberal amount of transmission fluid. See
Figure
7C-154.32. Inspect reverse clutch piston springs. Evidence of
extreme heat or burning in the area of the clutch may
have caused the springs to take a heat set and would
justify replacement of the springs.
33. Install the twenty-four reverse clutch piston re-
turn springs.Figure
7C-15434. Install retaining seat.
35. Compress return springs using second and re-
verse clutch piston spring compressor tool J-2590-12
with adapter J-21420-1. Care should be taken not to
damage retainer should retainer catch in snap ring
groove. See Figure 7C-155.
36. Install snap ring using snap ring pliers such as
J-8059. See Figure 7C-155. Do not air check reverse
clutch as the clutch is not complete and damage to
the return spring retaining seat may occur.
Page 472 of 625
AUTOMATIC TRANSMISSION 7C-111
OIL PUMP /’ASSEMBLY
ASPklNG
I(ETAINERSNAP RING
PLIERS
h7C146
Figure 7C.15537. Turn oil pump and reverse clutch assembly so
that oil pump face is facing up.
38. Install oil pump gears using the location mark
made before disassembly.
39. Check the end clearance of both gears to the oil
pump face. Clearance should be between
.0005 to
.0035. See Figure 7C-156.Disassembly, Inspection and Reassembly of Second
Clutch
1. Remove ring gear retaining ring from second
clutch drum. See Figure X-157.
GEAR
Figure
7C-1572. Remove ring gear. See Figure
7C-158.
SECOND CLUTCH DRUM
:-157Figure
7C-15641. Replace the oil pump assembly if the end clear-
ance is not within specifications.Figure 76.158
3. Remove second clutch spacer plate retaining ring.
4. Remove second clutch spacer plate. See Figure7c- 159.
Page 477 of 625
7C.1161973 OPEL SERVICE MANUALDRUM
THIRD CLUTCH
PISTON
70174Figure 7C-174
damaged, replace piston. Install new lip seal on pis-
ton. See Figure
7C-175.
CHECKTHI
Figure 7C-175
12. Install new oil lip seal on input shaft inside of
third clutch drum. See Figure
7C-176.13. Inspect steel thrust washer on front face of third
clutch drum. Replace if scored or damaged. See Fig-
ure 7c-177.
14. Install third clutch piston into third clutch drum
using a
.020 music wire crimped into a piece of cop-
per tubing and a liberal amount of transmission fluidFigure 7C-176
Figure 7C-177
so that lip seal is not damaged upon installation. See
Figure
7C-178.15. Install the 12 third clutch piston return springs
onto piston.
16. Install retaining seat.
17. Using compressor tool J-23075 on retaining seat,
compress piston return springs. Care must be taken
so that retaining seat does not catch in snap ring
groove and damage retainer.
18. Install snap ring using snap ring pliers such as J-
8059.
Page 485 of 625

7C.1241973 OPEL SERVICE MANUAL
14. Remove the downshift timing valve plug retain-
ing pin and remove downshift timing valve plug.
Remove the low speed downshift timing valve and
spring.
15. Remove the manual low and r&erse control
valve retaining pin. Remove the spring and the
manual low control valve and the reverse control
valve.
16. Remove the l-2 accumulator valve retaining pin
and remove the l-2 accumulator valve plug, l-2 ac-
cumulator valve and spring.
17. A clean work area which is free of dirt and dust
should be used to inspect, clean and install the valves
in the valve body. Handle valve components with
clean hands and tools. Since most valve failures are
caused initially by dirt or other foreign matter pre-
venting a valve from functioning properly, a
thorough cleaning of all the components with a
cleaning solvent is essential. Do not use paraffin toclean out the valve body passages and valve bore.
Compressed air may be used to blow out the pas-
sages.18. Inspect each valve for free movement in its re-
spective bore in
t.he valve body. If necessary, use
crocus cloth to remove small burrs on a valve. Do
not remove the sharp edges of the valves as these
edges perform a cleaning action within the bore.
19. Inspect the valve springs for distortion or col-
lapsed coils. Replace the entire valve body assembly
if any parts are damaged.
20. Inspect the transfer plate for dents or distortion.
Replace transfer plate if necessary.
21. Reassemble the valves, springs, plugs and retain-
ing pins in their proper location and order into the
valve body using a liberal amount of transmission
fluid. See the spring data chart which includes the
spring identification sizes in the event springs have
been disarranged.
LocationApplication
PumpPressureRegulator Valve....................................................
PumpPrimingValve
...........................................................
.............Valve Body1.2ShiftValve......................................................................
Valve Body2-3ShiftValve......................................................................
Valve BodyDetentPressureRegulatorValve......................................
Valve BodyHigh-Speed Timing Valve....................................................
Valve BodyLow-Speed
TimingValve....................................................
Valve BodyReverse and Low Control Valve
........................................
CSSDetentValve..........................................................................
Valve Body1-2 Accumulator Valve........................................................
Valve Body3-2Control
Valve..................................................................
Gov. BodySecondary
Governor Valve................................................
Valve BodyAccumulator Piston
..............................................................
CaseServo Return..........................................................................SHVOServoCushion
........................................................................
Clutch PackClutchReturn(All)................................................................ SPRING IDENTIFICATION CHART
FreeOuter
HeightDiameter
2.756
,7601.043
,3202.467
,7201.769
,7001.625,474
1.349
,4061.380,406
1.343
,4062.569
,6751.072
,5201.853
.4061.317
,4061.9171.224
2.2401.850
1.0391.267
1.050
,42422. Install spring and accumulator piston in valve
body.
23. Compress accumulator piston with C-clamp and
install retaining ring.
24. Install new valve body gasket.2. Inspect and clean oil passages with cleaning sol-
vent and air.
3. Check for good retention of band anchor pins.
25. Bolt the transfer plate and gasket to the valve
body. Torque to 6-8 lbs. ft.
Disassembly, Inspection and Reassembly of Case
1. Inspect case for damage. See Figure
7C-202.4. Inspect all threaded holes for thread damage.
5. Inspect detent valve and modulator valve bores for
scratches or scoring.
6. Inspect case bushing inside of case at rear. If
da-maged, remove bushing with remover and installer
tool J-23 130-3 and driver handle J-8092. See Figure
7C-203.