1973 OPEL 1900 Service Manual

7C- 961973 OPEL SERVICE MANUAL
Figure 7C-96
10. Detach rear engine support from transmission
crossmember. See Figure 7C-97.Figure 7C-98
Figure
7C-9711. Support transmission below oil pan with a suita-
ble jack.
12. Unscrew transmission crossmember from side
members. See Figure
7C-97.13. Lower transmission as far as possible,
14. Drain transmission oil.
15. Detach selector rod from ball pin of the outer
transmission selector lever on right transmission
side. See Figure
7C-98.16. Unscrew oil cooler pipes from transmission cow-
ter holding with a second wrench. Then plug oil
cooler pipes. See Figures 7C-99 and
7C-101.Figure 7C-99
17. Pull modulator line off diaphragm.
18. Unscrew detent cable retainer from transmission,
pull cable out of transmission, and unhook from de-
tent valve. See Figures 7C-102, 7C-103, and 7C-104.

AUTOMATIC TRANSMISSION JC- 97
Figure 7C-101Figure 7C-103
Figure 7C-102
19. Pry detent cable and oil cooler pipes out of retain-
ers on transmission oil pan.
20. Unscrew speedometer cable and pull it out of
speedometer driven gear housing.
21. On both engine sides unscrew engine support
brackets from torque converter housing. Slacken’
front attaching bolt only. See Figure
7C-105.22. Remove torque converter housing cover plate.Figure 7C-104
23. Mark flex plate and converter for reassembly in
same position.
24. Unscrew the three torque converter to
flex plate
attaching bolts. See Figure
7C-106.25. Pry transmission loose from engine.
26. Move transmission rearward to provide clear-
ance between converter and flex plate to install con-
verter holding tool J-21366. Lower transmission and
move to bench.

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

AUTOMATIC TRANSMISSION 7C- 99Converter Housing Oil SealWith transmission on portable jack and converter
removed, converter housing oil seal may be removed
without disassembling transmission using tool
J-23129, and slide hammer J-7004.
2. Using tool J-23129 remove oil seal with slide ham-
mer.3. Install new oil seal using installer J-21359.
Removal of Oil PanThis operation can be performed with transmission
in vehicle.
1. Remove the twelve oil pan attaching bolts.
2. Remove oil pan and gasket. See Figure
7C-108.Figure
7C-I 10Figure
7C-108
REMOVAL OF VALVE BODY
8 Removal of Valve BodyThis operation can be performed with transmission
in vehicle
1. Remove the manual detent roller and spring, re-
tained by two bolts. See Figure
7C-110.2. Remove the three attaching bolts holding the
strainer assembly to the valve body and remove. Dis-
card gasket.
3. Remove the eight bolts from transfer plate rein-
forcement and remove reinforcement. See Figure 7C-
111.Figure
7C-1 11
4. Remove the four servo cover attaching bolts and
remove servo cover and gasket. See Figure
7C-112.5. Remove remaining eight bolts attaching valve
body to case. Carefully remove valve body with gas-
ket and transfer plate. See Figure
7C-113.Care must be taken so that manual valve and manual
valve link “A” are not damaged or lost during re-
moval of valve body from the case.

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.

AUTOMATIC TRANSMISSION 712-1033. Remove extension housing and gasket. See Figure7C- 124.
Figure 7C-124
4. Remove parking
paw1 actuator rod from transmis-
sion case.
Removal of Speedometer Drive Gear, Governor
Body and Governor Hub
1. Depress speedometer drive gear retaining clip and
remove speedometer drive gear by sliding off output
shaft. See Figure
7C-125.
7c-125Figure 7C-125
2. Remove the four (4) attaching bolts from the gov-
ernor body and remove governor and gasket. See
Figure
7C-126.Figure 7C-126
3. Remove governor hub snap ring from output shaft
using snap ring pliers, such as J-8059. See Figure 7C-
128.Figure 7C-128
4. Slide governor hub off the output shaft
Removal of Converter Housing, Oil Pump, Reverse
and Second Clutch Assembly
1. Turn transmission in holding fixture so that con-
verter housing is facing up.
2. Remove the seven converter housing attaching