Page 561
3. Fit governor in housing with cover plate facing forward.
4. Hold the shaft horizontal with the driver ball in position and insert the shaft in the bearing housing so
that the ball engagesthe track in the governor.
5. Shim between governor and front bearing.
6. Screw on nut and tig~ten to prescribed torque of
245-265 Nm (165-200 ft.lb., 25-27 kpm).
CHECKING PRE-LOAD WITH SPRING BALANCE
Fixture 8790636 with retainer ring
8. Fit seal housing and 0-ring to bearing housing.
TIGHTENING
THE PINION NUT
Fixture 8790636 with retainer ring
7. Check the pre-load with a dynamometer. Adjustment
of the pre-load is carried out by placing shims between
the front bearing and the governor housing.
Lubricate the bearing sparingly.
New bearings 27-46 N (6.1-10.3 lb., 2. 7-4.6 kp)
dynamometer reading which corresponds to a torque
of 1.8-3.0 Nm (15-25 in.lb., 0.18-0.30 kpm). Old
bearings that have done more than 1,200 miles (2,000
km): 15-24 N (3.3-5.3 lb., 1.5-2.4 kp) dynamomet~ reading which corresponds to a torque of 0.9-1.5
Nm (7.5-12.5 in.lb., 0.09-0.15 kpm).
S 3207
PINION BEARING DISASSEMBLED
1. O-ring
2. Seal housing
3. Nut
4. Bearing
5. Shims
6. Governor
7. Shaft seals
8. Bearing housing
9. Pinion shaft
SI\AB
472-19
Page 562
GOVERNOR
There are two different types of governor. Complete governors of both types are completely interchangeable.
2
.L
As from model 1975 (gearbox No. 20.000) a new governor that gives altered shift speeds is introduced. The new
governor can be separated from earlier types by the "X"
knurles around the governor valve waist.
3 4 5 6
7
11-~
GOVERNOR
I. Lock washer for the governor weight
2. Screws
3. Governor weight
4. Governor housing
5. Governor valve
Dismantling
6. Spring
7. Shaft
8. Governor carrier
9. Washer
Check that the valve does not stick when it is turned and
moved backwards and forwards in its seating. After fitting,
the valve should move freely when the governor is shaken.
1. Take the governor off the carrier.
2. Undo the screws securing the cover washer on the
governor housing.
3. Remove the lock washer and take out the governor
weight and valve.
Assembling
Before reassembling, lubricate all parts with transmission
oil.
Reassemble in reverse order of dismantling.
CHECKING THAT THE GOVERNOR VALVE MOVES FREEL y
472-20
SAAB
Page 563
VALVE HOUSING
At the moment there are two different types of valve
housing. Complete valve housings of both types are completely interchangeable.
S3408
VALVE
HOUSING DISASSEMBLED
1. Primary regulator valve
2. Secondary regulator valve
3. Carrier and cam for kick-down valve
4. Kick-down and throttle valve
5. Lower part of valve housing
6. Servo orifice control valve
7. Modulator valve
8. Manual valve
9. Shift valve for 1st-2nd gear
10. Shift valve for 2nd-3rd gear
11. Upper part of valve housing
Springsfor control system
Approx. free length
Spring
1-2 Shift valve
2-3 Shift valve
Primary regulator valve
Secondary regulator valve
Servo orifice control valve
Modulator valve
Throttle valve, inner spring
Throttle valve, outer spring
Number
Wire diameter
Major diameter
in.
mm
of turns
in.
mm
in.
mm
1.094
1.590
2.850
2.593
1.005
1.069
0.807
1.185
27.8
40.4
72.4
65.9
25.53
27.15
20.5
30.1
13 1/2
22 1/2
14 1/4
21 1/2
17
19
28
18
0.024
0.036
0.054
0.065
0.024
0.028
0.D18
0.032
0.61
0.91
1.37
1.65
0.61
0.71
0.46
0.81
0.235
0.352
0.600
0.485
0.203
0.211
0.141
0.236
5.97
8.94
15.24
12.32
5.16
5.36
3.58
5.97
SAAB
472-21
Page 564
Dismantling
Assembling
NOTE! All work on the valve housing should preferably
be done in a diesel test room or clean room of equivalent
standard.
NOTE! Before assembling, make sure that all components _
are thoroughly clean and free from scratches. If the valves
are scratched they can be smoothed with a fine emery
cloth. Small lengtwise scratches in the housing can be
tolerated, but if the scratches are big enough to be felt
distinctly with the fingernails, the housing must be exchanged. Small scratches running right round the cylinder
can be tolerated. Check that the valves move freely in
their cylinders.
When the valve springs are removed, the valves should
move due to their own weight when the valve housing
is tilted. Rotate the valves and check that they do not
stick iri any position.
1. Dip the valves in automatic transmission oil before inserting them.
2. Mount the secondary regulator valve and spring.
3. Fit the primary regulator valve with sleeve and spring.
4. Fit the modulator valve, spring, valve and plug and
secure with the pin.
5. Fit the servo orifice control valve with spring and stop.
6. Fit the throttle valve with spring and stop and the
downshift valve with spring. See illustration.
1. Undo both carrier screws and the cam for the downshift
valve
VALVE HOUSING
1. Screws, carrier for downshift valve cam
2. Downshift valve cam
2. Pull out the manual valve.
3. Separate the upper and lower sections of the valve
housing by removing six screws from the top and two
screws from the bottom and the four screws for the
manual valve lever bracket.
4. Undo the eight screws securing the oil tube plate.
5. Remove the throttle valve stop. Then pull out the
downshift valve, spring and throttle valve.
6. Remove the servo orifice control valve stop and pull
out the valve.
7. Remove the pin retaining the modulator valve plug and
take out the plug, valve, piston and spring.
8. Undo the three screws from the end plate and take
out the primary regulator valve spring, sleeve and valve
and the secondary regulator valve.
LOCATION OF BALL VALVE
IN VALVE
HOUSING
7. Screw the top and bottom housing sections together.
8. Fit the manual valve.
9. Fit the detent spring carrier and the downshift valve
cam.
10. Check the position of the manual valve as follows:
Slide the valve into the neutral position i.e. the
third locking position from the inside of the valve
(see illustration). In this position, the cylindrical ·
sealing surface closest to the locking end of the
· ·REMOVING THE END PLATE
9. Remove the screws from the cover on the top section
of the valve housing and take out the 1-2 and 2-3
shift valves. '
472-22
&AMI
Page 565
valve should be centred around the cast bridge between the end plate and the opening through
which the valve is visible. (See illustration)
Assembling
Reassemble in the reverse order. Use tool 8790248 to center the pump.
Check the O-ring on the outside of the housing.
MANUAL VALVE IN NEUTRAL POSITION
Where necessary, adjustment can be made by bending the spring on the locking device.
OIL PUMP
Dismantling
1. Undo the five screws and the slotted head screw holding the pump housing together and separate the housing.
2. Check that the back plate is free from scratches and
otherwise undamaged.
3. Mark the pump gears with a pencil or similar and remove them.
4. Check that the pump gears are free from scratches and
other damage.
5. Check the bearing in the pump housing and the seal.
OIL PUMP
1. Tool for centering the pump at assembling, 8790248
2. 0-ring
3. Housing
Changing the bearing
1. Remove the lock ring.
2. Tap the narrow end of the shaft gently with a plastic
mallet to free the shaft with the bearing.
3. Knock off the bearing with a piece of tubing of 1.46"
(37 mm) inner diameter and 5.9" (150 mm) long.
4. Reassemble in the reverse order.
OIL PUMP DISASSEMBLED
1. Pump housing
2. Back plate
3. Pump gears
4. Pump housing, front
472-23
Page 566
Changing the seal ring
PARKING PAWL
Remove the seal with a screwdriver. Fit the new seal
using tool 8790164.
Note that this seal has to withstand the system pressure;
thus care must be taken when assembling the oil pump
and torque converter.
In order to ensure the functioning of the parking pawl
it has been necessary to provide two gear selector rods,
one of which is 0.1" (2.5 mm) longer than the other.
Variations in length due to assembly tolerances can thus
be eliminated. Both rods can be identified as the longer
one is grooved, see illustration. When fitting, make the
following checks:
CHANGING THE BEARING IN THE TORQUE CONVERTER HOUSING
1. Remove the lock ring.
2. Pull out the bearing using a drift.
A. Short rod (without groove)
Fit the rod and move it to gear selector position P. Press
the rod forward towards the torque converter so that the
play on the rod is eliminated. Measure the distance between the tooth of the parking pawl and the bottom of
the clearing between the teeth of the ring gear where the
pawl engages. If this measurement is greater than 0.04"
( 1 mm), the longer rod must be fitted.
1 mm (0.04'") Max.
S 4114
SHORT ROD (WITHOUT GROOVE)
REMOVING THE BEARING IN THE TORQUE CONVERTER
HOUSING
Reassemble in the reverse order using tool 8790164.
B. Long rod (with groove)
Fit the rod and move it to gear selector position R. Press
the rod backward (towards the final drive) so that the
play on the rod is eliminated. Measure the distance between the tooth of the parking pawl and the nearest tooth
crown on the ring gear. If this measurement is less than
0.04" (1 mm), the shorter rod must be fitted.
Identification groove
1 mm (0.04") Min.
S4115
INSTALLING
HOUSING
THE BEARING IN THE TORQUE CONVERTER
Sleeve 8790164
472-24
LONG ROD (WITH GROOVE)
Page 567
REAR BAND
Adjusting
The rear band adjusting screw is located outside the transmission casing on the left-hand side.
1. Slacken the lock nut a few turns.
2. Tighten the adjusting screw to the prescribed torque
13-14 Nm (10 ft.lb., 1.3-1.4 kpm). using tool
8390115 (square socket). Then back off 3/4 turn.
3. Hold the adjusting screw in that position and tighten
the lock nut.
2. Tighten the adjusting screw to a torque of 1.3 Nm
(10 in.lb., 12 kpcm).
3. Check that the gap between the self-adjusting spring
and the lever is 1.5-2 thread flights.
For adjustment of the throttle cable and gear selector
cable, refer to section 444 "Transmission control".
DIFFERENTIAL
ADJUSTING THE REAR BAND
BLEEDER
FRONT BAND
Adjusting
1. Place the spacer 8790073 1/4" (6.35 mm) between
the adjusting screw and the boss on the piston.
ADJUSTING THE FRONT BAND
Spacer 8790073
SAAB
472-25
Page 568
CONTACT FOR BACK-UP LIGHTS AND STARTER
(Situated on the gearbox and from 1979 model)
Disconnect the cable. The wide terminals are for reversing
lights and the narrow ones for starter motor.
1. With the selector lever at D and the inhibitor switch
screwed out, connect a test lamp between the narrow
terminals (starter motor) via a battery. The lamp should
light up.
2. Screw in the inhibitor switch until the lamp goes out.
Mark the position on both the inhibitor switch and
the transmission. Move the test lamp to the wide (reversing light) terminals and screw in the inhibitor
switch until the lamp lights up again. Count the number of turns betw.een these two positions, and back off
to a point half-way between them.
3. Secure the lock nut with tool 8790123 tightening to
the correct torque. NOTE! If the inhibitor switch is
locked too hard, it may be damaged.
A
B
S2632
ADJUSTING THE CONTACT FOR BACK-UP LIGHTS AND
STARTER MOTOR
A. Lamp connected to the starter motor switch
8. Lamp connected to the back-up light switch
REVERSING LIGHT AND START INTERLOCK
RELAY CONNECTOR AS FROM 1980 MODEL
(as from 1980 model the connector is situated in the
gear lever housing).
1. Start interlock relay connector
2. Reversing light connector
Setting:
Set the gear selector lever in neutral. Rotate the connector body so that the lever is exactly opposite the mark
on the connector body. Tighten the two connector
body mounting bolts.
472-26
5'IAEI
Page 569
DISASSEMBLING AND CHECKING THE GOVERNOR
(Transmissionin car)
1. Jack up the car. Remove the small cover (two slotted
screws) and let the oil run out (about 1 pint = 1/2
liter).
2. Revolve the wheels so that the governor's two retaining screws are accessible.
3. Undo the retaining screws so that the governor can be
removed.
S4100
CHECKING THAT THE VALVE IS NOT STUCK
5. Replace the governor and cover.
THE GOVERNOR SCREWS ARE REMOVED
4. Check that the governor valve moves freely; i.e. that
the valve moves when the governor is shaken.
If the valve is stuck it must be disassembled and the
parts thoroughly cleaned. Check afterwards that the
valve does not stick when it is turned and moved toand-fro in its seating. Scratches on the valve can be
smoothed with a whetstone or fine emery cloth. Before the parts are reassembled they should be lubricated with automatic transmission oil.
SAMI
472-27
Page 570
DISASSEMBLY AND ASSEMBLY OF VALVE HOUSING
(Transmission in car)
Disassembling
1. Jack up the car and remove the guard plate.
2. Drain the oil and clean carefully round the forward
bottom cover. If the car is rocked a further quantity
of oil will run out from the rear part of the transmission.
3. Remove the forward bottom cover.
LIFTING OUT THE VALVE HOUSING
7. Remove the large suction pipe from the pump. Check
the O-ring.
FORWARD BOTTOM COVER REMOVED
Assembling
1.
4. Disconnect all the oil pipes.
5. Disconnect the throttle wire.
Fit the large suction pipe (with a fault-free O-ring)
together with the pressure pipe into the oil pump.
Both pipes are secured with a clip.
SUCTION PIPE AND PRESSURE PIPE CONNECTED TO THE
OIL PUMP
DISCONNECTING THE THROTTLE WIRE
6. Undo the three valve housing retaining screws. The
valve housing should now only be supported by the
pressure pipe from the oil pump. Lift out the valve
housing.
472-28
2.
&AMI
The small pipe which provides the torque converter
with oil pressure and the pressure pipe are also attached with a clip. These pipes must be in line with
each other.