1973 OPEL MANTA oil pressure

AUTOMATIC TRANSMISSION 7C- 83
ConditionCause
Starting
1. No starting in any driverange.a) Low oil level.
b) Clogged suction screen.
c) Manual valve linkage or inner trans-
mission selector lever disconnected.
d) Input shaft broken.e) Pressure regulator valve stuck in open
position. -0 Failed oil pump.
2. No starting in any drive range
for a time. Driving possible only
after repeatedly moving selector
lever to and fro.Manual valve position does not coincide
with valve body channels:
a) Selector lever shaft retaining
pin dropped out.
b) Connecting rod to manual valve
shifting.
c) Selector lever shaft nut loose.
3. No starting after shifting
lever from “P” to “D”, “S”, or “L”
(inadequate engine acceleration).a) Parking
paw1 does not disengage.
4. Sudden starting only after
increase of engine RPM.a) Band servo piston jamming.
b) Low oil level.
c) Oil pump defective.
d) Oil screen missing.
e) Sealing ball in valve body dropped out
5. Heavy jerking when starting.a) Low oil pressure.
b) Wrong modulator valve.
c) Pressure regulator valve stuck.
d) Sealing ball in valve body dropped out.
6. No starting in “D” or “S”
range, but in “L” and “R” range.a) Input sprag installed backwards.
b) Input sprag failure.
7. No starting in “D” or “S” and
“L” (proper driving in “R”; see
also point 9).a) Band worn, does not grip.
b) Band servo piston jamming.
c) Excessive leak in band servo.
d) Parking
paw1 does not disengage.

7C. 841973 OPEL SERVICE MANUALConditionCause8. No starting in “R” range
(proper driving in all other
ranges).a) Reverse clutch failure.
9. Drive in selector lever
position “N”.a) Inadequate selector lever linkage.
b) Planetary gear set broken.
c) Improper adjustment of band.
Gear Change1. No l-2 upshift in “D” and “S”
(transmission remains in 1st gear
at all speeds).a) Governor valves stuck.
b) 1-2 shift valve stuck in 1st gear
position.
c) Seal rings (oil pump hub) leaky.
d) Large leak in governor pressure circuit.
e) Governor screen clogged.
2. No 2-3 upshift in “D” (trans-
mission remains in 2nd gear at all
speeds).a) 2-3 shift valve stuck.
b) Large leak in governor pressure circuit.
3. Upshifts in “D” and “S” only
at full throttle.a) Failed vacuum modulator.
b) Modulator vacuum line leaky or
interrupted.
c) Leak in any part of engine or
accessory vacuum system.
d) Detent valve or cable stuck.
4. Upshifts in “D” and “S” only
at part throttle (no detent
upshift).a) Detent pressure regulator valve stuck.
b) Detent cable broken or misadjusted.
5. Driving only in 1st gear of
“D” and “S” range (transmission
blocks in 2nd gear and “R”).a) “L” and “R” control valve stuck in
“L” or “R” position.
6. No part throttle 3-2 downshift
at low vehicle speeds.a) 3-2 downshift control valve stuck.
7. No forced downshift.a) Detent cable broken or improperly
adjusted.
b) Detent pressure regulator valve stuck.

AlITOMATIC TRANSMISSION 7C- 85
ConditionCtSlSl?8. After full throttle upshifting
transmission shifts immediately
into lower gear upon easing off
accelerator pedal.a) Detent valve stuck in open position,
b) Detent cable stuck.
c) Modulator vacuum line interrupted.
9. At higher speeds, transmission
shifts into lower gear.a) Retaining pin of selector lever shaft
in transmission dropped out.
b) Loose connection of selector lever
linkage to manual valve.
c) Pressure loss at governor.
10. Hard disengagement of selector
lever from “P” position.a) Steel guide bushing of parking
paw1actuating rod missing.
b) Manual selector lever stuck.
Shifts1. Slipping l-2 upshifts (engine
flares).a) Low oil pressure.
b) Sealing ball in valve body dropped out.
c) Second clutch piston seals leaking.
d) Second clutch piston centrifugal ball
stuck open.
e) Second clutch piston cracked or broken.
f) Second clutch plates worn.
g) Seal rings of oil pump hub leaky.
2. Slipping 2-3 upshifts (engine
flares).a) Low oil pressure.
b) Band adjustment loose.
c) Third clutch piston seals leaking.
d) Third clutch piston centrifugal ball
stuck open.
e) Third clutch piston cracked or broken.
f) Wear of input shaft bushing.
g) Sealing ball in valve body dropped out
3. Abrupt l-2 upshift.a) High oil pressure.
b) l-2 accumulator valve stuck.
c) Spring cushion of second clutch broken,
d) Second gear ball valve missing.
4. Abrupt 2-3 upshift.
a) High oil pressure
b) Incorrect band adjustment.
5. Abrupt 3-2 detent downshift at
high speed.a) High speed downshift valve stuck open.
b) Band adjustment.

7C- 881973 OPEL SERVICE MANUAL
Condition
6. Abrupt 3-2 coast downshift.Cause
a) Low speed downshift timing valve
stuck open.
7. Flare on high speed forceda) Low oil pressure.
downshift.b) Band adjustment loose
8. Flare on low speed forced
downshift.a) Low oil pressure.
b) Band adjustment loose.
c) High speed downshift timing valve
stuck in closed position.
d) Sprag race does not grip on 3-1 down shifting
Engine Braking
1. No engine braking in “L” range.a) Selector lever linkage improperly
adjusted.
b) Manual low control valve stuck.
2. No engine braking in “S” range.a) Selector lever linkage improperly
adjusted.
3. No park.a) Selector lever linkage improperly
adjusted.
b) Parking lock actuator spring.
c) Parking pawl.
d) Governor hub.
Noises1. Excessive noises in all drive
ranges.a) Too much backlash between sun gear
and planetary gears.
b) Lock plate on planetary carrier loose.
c) Thrust bearing defective.
d) Bearing bushings worn.
e) Excessive transmission axial play.
f) Unhooked parking paw1 spring contacts
governor hub.
g) Converter balancing weights loose.
h) Converter housing attaching bolt
loose and contacting converter.
2. Screaching noise when starting.
3. Short vibrating, hissing noise
shortly before 1-2 upshift.a) Converter failure.
a) Dampening cushion of reverse clutch
wearing into transmission case.
Abrasive
1. Excessive amount of iron dust
(can be picked up by magnet
in oil pan).a) Oil pump.
b) Governor hub.
c) Second clutch hub
2. Excessive amount of aluminum
dust (cannot be picked up by
magnet) in oil pan.a) Thrust face in case.
b) Rear bore of case.
c) Stator thrust washer
- check
converter end clearance.

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

AUTOMATIC TRANSMISSION 7C-109
Figure 7C-149
21. Using a drift on tap, press out oil pump bushing
with arbor press. Use rag or cloth to protect oil pumpface.22. Install new oil pump hub bushing with arbor
press using tool J-23130-1. See Figure
7C-149. Clean
pump body, including all holes and pockets
thoroughly. With oil pump shaft hole “A” facing
downward, scribe an aligning mark on oil pump
shaft inner diameter at the center of the oil groove
to the right of hole “A”. Scribe mark on outer edge
of bushing through the centers of the small and large
drilled holes “B”. Place bushing into oil pump shaft
with small hole up, and align scribe marks on bush-
ing with those made in oil pump shaft. Use arbor
press to drive bushing into oil pump shaft until
seated in the bore. Care must be taken so that bush-
ing is pressed in straight, using the scribe marks as
a guide until firmly seated.
23. Inspect and thoroughly clean the pressure regula-
tor and priming valve assemblies. Immerse all valves
in transmission fluid before installing in bores.
24. Install pressure regulator valve in oil pump body
bore. See Figure
7C-150.25. Install pressure regulator valve, two spring seats,
spring, boost valve and sleeve in oil pump body bore.
26. Depress pressure regulator boost valve sleeve un-
til backend lines up with pin hole and insert pin to
XWP$.27. Install priming valve assembly from front face of
pump. Priming valve retainer should be pressed in
flush with surface of oil pump body. See Figure 7C-
151.28. Inspect oil pump hub oil seal rings. Replace if
damaged or side wear is noted. See Figure
7C-152.29. Inspect reverse clutch piston for damage, Re-
place if necessary.
Figure
7C-150

7. Remove accumulator piston, oil ring, and spring.
See Figure 7C-200.ACCUMULATOR PISTON
Figure 7C-200AUTOMATIC TRANSMISSION 7C-123
8. Inspect accumulator oil ring for damage or edge
wear and piston for damage. Replace if necessary.
For steps 9 through 21 refer to Figure 7C-201.9. Remove 1-2 Shift control valve retaining pin, l-2
shift control valve sleeve, control valve, 1-2 shift
valve spring and valve. It may be necessary to
remove burrs in valve body bore made by retaining
pin prior to removal of the sleeves and valves.
10. Remove the 2-3 Shift control valve retaining pin
and sleeve. Also, remove the 2-3 shift control valve,
spring seat, spring and 2-3 shift valve.
11. Remove the 3-2
,control valve retaining pin and
plug. Remoye 3-2 control valve spring and control
valve.12. Remove the detent pressure regulator valve re-
taining pin, spring, and detent pressure regulator
valve.13. Remove the high speed downshift timing valve
retaining pin and spring and remove valve.
1.RETAINING PIN
2.1-2 SHIFT CONTROL VALVE SLEEVE
3.1-2 SHIFT CONTROL VALVE
4. l-2 SHIFT CONTROL VALVE SPRING5.1-2 SHIFT VALVE
6.RETAINING PIN
7.2-3 SHIFT CONTROL VALVE SLEEVE
8.2-3 SHIFT CONTROL VALVE9.2-3 SHIFT CONTROL VALVE SPRING
IO. 2-3 SHIFT CONTROL VALVE SPRING SEAT
11.2-3 SHIFT VALVE
12.1-2 ACCUMULATOR VALVE SPRING13.1-2 ACCUMULATOR VALVE
14.RETAINING PIN
15.1-2 ACCUMULATOR VALVE PLUG16.RETAlNlNG PIN
17.3-2 CONTROL VALVE PLUG18.3-2 CONTROL VALVE SPRING
d 28 29 31 32 33uu44ucBBt?a~~19. 3-2 CONTROL VALVE
20. REVERSE CONTROL VALVE
21. MANUAL LOW CONTROL VALVE
22. MANUAL LOW CONTROL VALVE SPRING
23. RETAINING PIN
24. RETAINING PIN
25. DETENT PRESSURE REGULATOR VALVE SPRING
26. DETENT PRESSURE REGULATOR VALVE
27. MANUAL VALVE
28. LOW SPEED DOWNSHIFT TIMING
VALVE SPRING
29. LOW SPEED DOWNSHIFT TIMING VALVE
30. RETAINING PIN
31. TIMING AND CONTROL VALVE PLUG
32. HIGH SPEED DOWNSHIFT TIMING VALVE
33. HIGH SPEED DOWNSHIFT TIMING
VALVE SPRING
34. RETAINING PIN
7c-201Figure 7C-201 Valve Body
- Exploded View

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.