1973 OPEL GT-R service

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

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

AUTOMATIC TRANSMISSION 7C-101
Figure 7C-1 16
-117Figure
7C-118 GT Models
Figure 7C-1 17 GT Modelsthat one case services both models and is machined
to accept selector lever on either side with the unused
hole being plugged.
1. Remove retaining ring From parking actuator rod
to selector inner lever. See Figure 7C-119.
2. Remove selector inner lever locking nut from se-
lector lever shaft.
3. Remove selector inner lever from selector lever
shaft.4. Remove selector lever shaft spring pin by pulling
upwards with small pliers.Figure
7C-1195. Remove selector lever shaft. See Figure 7C-120.
6. Remove selector lever shaft oil seal and discard.
Removal of Modulator Assembly
This operation can be performed with transmission
in vehicle using tool J-23
100.1. Remove vacuum modulator From transmission
case. See Figure
7C-94. Care should be taken not to
lose the modulator plunger.

7C-1021973 OPEL SERVICE MANUAL
Figure 7C-120Figure 7C-122
Figure 7C-12 1
2. Remove modulator valve and sleeve from trans-
mission case.
Removal of Detent Valve Assembly
This operation can be performed with transmission
in vehicle
1. Remove spring pin by pulling upward with pliers.
2. Lightly tap detent valve assembly from front of
case and remove detent valve, sleeve, spring, and
spring seat from rear of easel See Figure 7C-122,Removal of Extension Housing
This operation can be performed with transmission
in vehicle
1. Remove bolt holding speedometer driven gear
housing retainer and carefully remove retainer and
pull speedometer driven gear assembly from exten-
sion housing. See Figure
7C-123.Figure
7C- 123
2. Remove the seven attaching bolts from extension
housing to case.

7C-1041973 OPEL SERVICE MANUAL
bolts which are the outer bolts in the housing. See
Figure 7C-129.
Figure 7C-129
3. Remove converter housing with oil pump, reverseand second clutch assemblies. Do not lose selective
thrust washer. See Figure
7C-130. Second clutch as-
sembly may remain in case. If so, remove with re-
verse clutch plates.
Figure 7C-130
4. Remove reverse clutch plates from transmission
case, See Figure
7C-131.
T%RSE~L~~T~H PLATES
7c-131
Figure
7C-13 I
Removal of Third Clutch Assembly. Planetary
Carrier Assembly, Reaction Sun Gear and Drum
Assembly and Low Band1. Remove third clutch assembly. See Figure 7C-
132.
Figure 7C-132
2. Remove planetary carrier and output shaft by slid-
ing out through front of case. See Figure
7C-133.Care should be taken not to lose the needle thrust
bearing and race in the planetary carrier assembly.
3. Remove reaction sun gear and drum with needle

7C-1061973 OPEL SERVICE MANUAL
Figure 7C-138
!LREVERSEZH
)N
OIL PUMP
t7c-1382. Remove selective washer from oil pump shaft. See
Figure
7C-138.3. Remove the oil pump outer oil seal and discard.
See Figure
7C-139.Figure 7’2.139
4. Remove the five bolts holding the converter hous-
ing to the oil pump.
5. Remove the converter housing. See Figure 7C-
140.6. Remove oil pump wear plate “A”. See Figure 7C-
140.Figure
7C-1407. Inspect front face of converter housing for oil leak.
See Figure
7C-141. If problem is diagnosed as a front
seal leak (presence of red oil coming from bottom of
converter housing), remove front oil seal.
7c141Figure
7C-1418. Inspect converter housing bushing. If worn,
remove bushing using tool J-21465-17 with drive
handle J-8092 from converter side of housing.
9. Clean converter housing thoroughly. Install con-
verter housing bushing flush with front face of hous-
ing using tool J-21465-17 with driver handle J- 8092.
See Figure
7C-142.

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

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.