check oil OPEL GT-R 1973 Repair Manual

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.

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.

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.

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.

AUTOMATIC TRANSMISSION 7C-1251. CASE VENT4.3RD CLUTCH7.SUCTION
2. CONVERTER OUT5MODULATOR8.LINE/3.2ND CLUTCH
6. BOOST9.REVERSEFigure 7C-202 Case Front View Oil Passage
Identification
7.
!nspect reaction sun gear drum bushing sleeve
inside case at rear for scoring. If necessary, replace
sleeve before installing rear case bushing.
8. Remove sleeve by grinding. Care must be used in
order that aluminum case is not damaged when
grinding sleeve.
9. Install new sleeve using installer tool J-23130-7
and driver handle J-8092.
10. Install new case bushing using remover and in-
staller tool J-23130-3 and driver handle J-8092.
Bushing should be installed flush with case at rear.
See Figure
7C-203.Figure 7C-2031. Drain Converter. If clutch disc material or
foreign matter has been found while draining con-
verter,
replace entire converter assembly as it can not be
cleaned properly.
2. Air check converter for leaks using converter
checking tool J-21369. Install tool and tighten. Ap-
ply 80 psi air pressure to tool. See Figure
7C-204.Figure 7C-204
3. Submerge in water and check for leaks.
4. Check converter hub surfaces for scoring or wear.
Installation of Selector Lever and Shaft1. Install new selector lever shaft oil seal in case.
Insert selector lever shaft through case from outside.
Care should be exercised so that oil seal is not da-
maged. See Figure
7C-206.2. Insert spring pin in case to secure selector lever
shaft.3. Guide selector lever over shaft and secure with
lock nut.
4. Insert parking
paw1 actuator rod from front of the
case and through hole in case at rear. See Figure 7C-
207.5. Install parking
paw1 actuator rod retaining ring.
Installation of Low Band1. Turn transmission case so that front of case is
upward.

AUTOMATIC TRANSMISSION 7C-129
4. Install reverse clutch cushion plate (wave washer)2. Insert guide pin into oil pump for alignment of
into case.converter housing and lower housing onto pump.Determining Selective Washer Size
1. Place gauging tool J-23085 on case flange andagainst input shaft. See Figure
7C-215.3. Install new oil seal washers on converter housing
to oil pump bolts, and loosely install bolts into con-
verter housing.
4. Use convkrter housing to oil pump aligning tool J-23082 to align converter housing to pump. See Fig-
ure
7C-216. Tool should bottom on oil pump gear.
Figure 7C-2 152. Loosen thumb screw on tool to allow inner shaft
to drop on second clutch drum hub.
3. Tighten thumb screw and remove tool J-23085.
4. Place selective washer removed from transmission
against inner shaft of tool J-23085. Selective washer
should be flush with top face of shaft. If not flush,
select next larger or smaller washer until correct size
is obtained. The washer selected should be exactly
flush or slightly below inner shaft for correct end
play in transmission. Selective washer removed from
transmission may be oil soaked and discolored.
CObX
ID
Yellow
Blue
Red
BVSNIl
GPX3”
Black
Thickness,070.,074,076.,080
.08 l-.085,086.,090,091.,095
,097.,101
Installation of Converter Housing, Oil Pump and
Reverse Clutch Assembly1. Turn case so that bottom of transmission is facing
upward.
1. Install oil pump wear plate onto oil pump.2. Slide governor hub along output shaft and seat
Figure 7C-2 165. Tighten the five bolts. Torque to
13-17 Ibs. ft. and
remove aligning tool l-23082.
6. Install new converter housing to case rubber oil
seal.7. Install new pump flange gasket.
8. Place selective washer, previously determined,
onto the oil pump shaft and retain with petroleum
jelly (unmedicated).
9. Install two guide pins in case and lower converter
housing and oil pump into case. See Figure
7C-217.10. Bolt converter housing to case using new oil seal
washers on all seven bolts. Torque to 13-17 lbs. ft.
I I. Check for correct assembly by turning input shaft
by hand.
Installation of Governor Assembly

7C-1341973 OPEL SERVICE MANUAL
Figure 7C-232
Torque Converter4. Rotate converter to check for free movement.
1. Place transmission on portable jack
2. Slide torque converter over stator shaft and input
shaft.3. Be sure that converter pump hub keyway is seated
into oil pump drive lugs and the distance “A” is
.20”to
.28”. See Figure 7C-232.
SPECIFICATIONS
GENERAL SPECIFICATIONS
Opel Three-Speed Automatic Transmission Fluid
RecommendationsUse DEXRON Automatic Transmission Fluid on/y
in all 1972 model Opel Automatic Transmissions
(GM part No. 1050568-69-70 or any other fluid hav-
ing DEXRON identifications).DEXIRON is an especially formulated automatic
transmission fluid designed to improve transmission
operation.
The oil pan should be drained and the strainer re-
placed every
24,ooO miles and fresh fluid added to
obtain the proper level on the dipstick. See subpara-
graph 2 for proper refill procedures. For cars sub-
jected to heavy city
traff%z during hot weather, or in
commercial use, when the engine is regularly idled
for long periods, the oil pan should be drained and
the strainer replaced every
12,ooO miles.
.
1.Checking and Adding FluidThe Opel three-speed automatic is designed to oper-
ate at the full mark on the dipstick at normal operat-
ing temperature (180 degrees F.) and should be
checked under these conditions. The normal operat-
ing temperature is obtained only after at least 15
miles of highway type driving or the equivalent of
city driving.
Fluid level should be checked at every engine oil
change.
The “FuIl” and “Add” marks on the trans-
mission dipstick indicate one (1)pint
difference. Todetermine proper fluid level, proceed as follows:
To determine proper level, proceed as follows:
1. With manual control lever in Park position start
engine. DO NOT RACE ENGINE. Move manual
control lever through each range.
2. Immediately check fluid level with selector lever
in Park, engine running, and vehicle on LEVEL
surface.At
t,his point, when a reading is made, fluid level on
the dipstick should be at the “FULL” mark.
3. If additional fluid is required, add fluid to the
“FULL” mark on the dipstick.
If the vehicle cannot be driven sufficiently to bring
the transmission to operating temperature and it

AUTOMATIC TRANSMISSION 7C-135
becomes necessary to check the fluid level, the trans-
mission may be checked at room temperature (70
degrees F.) as follows:
1. With manual control lever in Park position start
engine. DO NOT RACE ENGINE. Move manual
control lever through each range.
2. lmmediately check fluid level with selector lever
in Park, engine running, and vehicle on LEVEL sur-
face.At this point, when a reading is made, fluid level on
the dipstick should be I/4” below the “ADD” mark.
3. If additional fluid is required add fluid to bring
level to
l/4” below the “ADD” mark on the dip-
stick.If transmission fluid level is correctly established at
70 degrees F. it will appear at the “FULL” mark on
the dipstick when the transmission reaches normal
operating temperature (180 degrees F.) The fluid
level is set
l/4” below the “ADD” mark on the
dipstick to allow for expansion of the fluid which
occurs as transmission temperatures rise to normal
operating temperature of 180 degrees F.
Do not overfill, as foaming and loss of fluid through
the vent pipe might occur as fluid heats up. If fluid
is too low especially when cold, complete loss
of’drive may result which can cause transmission fail-
ure.
2.Draining oilpan and rep/a&g strainer assembly.
(a) Raise car on hoist or p/ace OnJxk stands, and
provide container to collect draining fluid.
(b) Remove oil pan and gasket. Discard gasket.
(c) Drain fluid from oil pan. Clean pan with solvent
and dry thoroughly with clean compressed air.
(d) Remove strainer assembly, strainer gasket and
discard.
(e) Install new oil strainer gasket. Install new strainer
assembly.
(f) Install new gasket on oil pan and install pan.
Tighten attaching bolts to 7-10 lb. ft.
(g) Lower car and add approximately three (3) pints
of transmission fluid through filler tube.
(h) With manual control lever in Park position, start
engine. DO NOT RACE ENGINE. Move manual
control lever through each range.
(i) Immediately check fluid level with selector leverin Park, engine running, and vehicle on LEVEL
sur-
face.(i) Add additional fluid to bring level to
l/4” below
the “ADD” mark on the dipstick. Do not overfill.
3.Adding Fluid to Fill Dry Transmission and Con-
verter Assembly
The fluid capacity of the Opel Three Speed Auto-
matic transmission and converter assembly is ap-
proximately IO-l/2 pints, but correct level is
determined by the mark on the dipstick rather than
by amount added. In cases of transmission overhaul,
when a complete fill is required, including a new
converter proceed as follows:
(a) Add approximately 10-l/2 pints of transmission
fluid through tiller tube.
The converter should be replaced on any major fail-
ure, such as a clutch or gearset, and an excessive
amount of foreign material is indicated in the pan. If
installation of a new converter is not required add
approximately five (5) pints of transmission fluid.
(b) With manual control lever in Park position start
engine and run at 1000 RPM. DO NOT RACE EN-
GINE. Move manual control lever through each
range.
(c) Immediately check fluid level with selector lever
in Park, engine running, and vehicle on LEVEL
sur-
face.(d) Add additional fluid to bring level to
l/4” below
the “ADD” mark on the dipstick. Do not overfill.
Opel Three Speed Automatic Transmission Towing
Instructions
If an Opel equipped with an automatic transmission
must be towed, the following precautions must be
observed:
The car may be towed safely on its rear wheels with
the shift lever in neutral position at speeds of 35 miles
per hour or less under most conditions.
However, the drive shaft must be disconnected or the
car towed on its front wheels if:
a. Tow speeds in excess of 35 mph are necessary.
b. Car must be towed for extended distances (over 50
miles).
c. Transmission is not operating properly.
If car is towed on its front wheels, the steering wheel

7C-1361973 OPEL SERVICE MANUALshould be secured to keep the front wheels in a
straight-ahead position.sand,. mud, or snow, move the selector lever from
“D” to “R” in a repeat pattern while simultaneously
applying moderate pressure to the accelerator. DoRocking Carnot race engine. Avoid spinning wheels when trying
If it becomes necessary to rock the car to free it fromto free the car.
Model DesignationsTrans.
converterReverse Clutch
ModelAssemblyPlates Required2nd Gear
Clutch3rd Gear Clutch
Plates Required
Plates RequiredOpel
1900
OG
GT
CIHInformation
Drive
(Composition Faced:
Drive3Drive3
Green
(Composition
Faced)(CompositionFaced)
Dot ofDriven (Steel)4Driven (Steel) 4
Driven (Steel) 4
PaintWaved1Waved1Waved.1Pressure1Pressure1Pressure1-.
Bolt Torque Specifications
Location
Oil Pan to Case......................................................................Transfer Plate to Valve Body............................................
ReinforcementPlatetoCase..............................................
ValveBodytoCase..............................................................
ServoCovertoCase............................................................
Modulator Assembly............................................................
ConverterHousingtoOilPump........................................
Converter Housing to Case................................................
Selector Lever Jam Nut......................................................
Governor Body to Governor..............................................
ExtensionHousing to Case................................................
Servo AdjustingBolt Lock Nut..........................................
Planetary Carrier Lock Plate..............................................
OilPressureCheckPlug......................................................
Flex Plate to Crankshaft......................................................
Converter to Flex Plate........................................................
ConverterHousingtoCylinderBlock..............................
intermediate Selector Lever to Console
Selector Lever Shaft........................................................
Rear Engine Support to Transmission
CaseExtension..................................................................
Outer Transmission Selector Lever to
TransmissionSelectorLeverShaft..............................
Oil Cooler Line Connector..................................................
Oil Cooler Line to Connector............................................
Oil Cooler Line to Oil Cooler Hose..................................
Oil Cooler Hose to Oil Cooler............................................
Torque
Lb.Ft.7-10
6-8
13.15
13.1516-1812.15
13.17
22.26
8-l 1
6-8
20.30
12.15
20.35
5-736.5
138.42
38.42
Thread
Size
5/16-18
l/6-20
5/16-18
5/16-18
5/16-18
5/16-18
5/16-18
l/4-20
3/8-l 6
18.20
18.22
13.1610-13
1 l-15
1 l-15
11.15

98-20 1973 OPEL SERVICE MANUAL
If we were to put a thermometer in the cold drain
water, we would see the temperature gradually creep
upwards. That is to be expected because heat is flow-
ing into the cold water making it warmer. Before
long the water would be as warm as the stored foods.
Then the water could no longer attract heat because
heat will not flow from one warm object to another
equally warm object. Since we no longer can draw
heat out of the foods we no longer are cooling them.
Now, let’s see what happens when we put ice instead
of cold water into the ice-box. This time, we’ll set the
thermometer on top of the ice (Fig. 9B-5). When wefirst look at the thermometer, it reads 32 degrees. A
couple of hours later, we open the ice compartment
door. The ice block is smaller because some of the ice
has already melted away
- but the thermometer still
reads 32 degrees. Again, still later, even more of the
ice has melted, yet the termometer continues to read
32 degrees. So long as any ice remains, no matter
how much of it has melted away, the temperature of
the ice stays right at 32 degrees.
All this time the ice has been soaking up heat, yet it
never gets any warmer no matter how much heat it
draws from the stored food. On the other hand, the
cold drain water got progressively warmer as it
soaked up heat. Why is it the addition of heat will
make water warmer yet won’t raise the temperature
of ice above the 32 degrees mark? If we till one
drinking glass with ice and another with cold water,
and put both glasses in the same room where they
could absorb equal amounts of heat from the room
air, we will find it takes much, much longer for the
ice to melt and reach room temperature than it did
for the water in the other glass to reach the same
temperature. Obviously, most of the heat was being
used to melt the ice. But it was the heat that appar-
ently disappeared or went into hiding because if
couldn’t be located with a thermometer. To best de-
scribe this disappearing heat, scientists turned to
Latin for the right word. They chose the word “la-
tent” which means hidden.
Latent Heat
So latent heat is nothing more nor less than hidden
heat which can’t be found with a thermometer.
What happens to the latent heat? Where does it
disappear to? At first it was thought it was in the
water that melted from the ice. But that wasn’t ex-
actly the right answer because, upon checking water
temperature as it melts from ice, it will be found that
it is only a shade warmer than the ice itself. It is not
nearly warm enough to account for all the heat the
ice had absorbed. The only possible answer is that
the latent heat had been used up to change the ice
from a solid into a liquid.
Many substances can be either a solid, or a liquid, ora gas. It just depends on the temperature whether
water for example was a liquid, or a solid (ice), or gas
(steam) (Fig.
9B-6).Figure 99-6 Temperature Determines State of Water
If we put some water in a tea-kettle, set it over a tire
and watch the thermometer as the water gets hotter
and hotter, the mercury will keep rising until the
water starts to boil. Then the mercury seems to stick
at the 212 degrees mark. If we put more wood on the
fire, despite all the increased heat, the mercury will
not budge above the 212 degree mark (Fig.
9B-7).Figure 98.7 Boiling Water Never Exceeds 2 12
DegreesEven though many housewives won’t believe it, no
matter how large or hot you make the flame, you
can’t make water hotter than 2 12 degrees. As a liquid
changes into a gas, it absorbs abnormally great
amounts of heat without getting any hotter. Here is
another instance where heat disappears.
Now we have two different kinds of latent heat,
which are quite alike. To keep their identities sepa-
rate, the first one is called latent heat of fusion. Since
fusion means the same as melting, it is a good de-
scriptive name. The other kind is called latent heat
of vaporization because‘ that means the same as
evaporation.
It may seem as though we have drifted into a story