|
Clutch
Engine type M 28.21/43/45
|
Design
|
Two
plate, dry clutch with pulled version diaphragm springs, located on engine
side, hydraulic operation.
|
|
Pressure
plate
|
MFZ
200
|
|
Contact
pressure
|
5600…6200
N
|
|
Clutch
disk
(flywheel
end)
|
200
Ř
|
|
Clutch
disk lateral runout
|
0.4
mm at 190 Ř
|
|
Clutch
play at clutch pedal*
|
approx.
3 mm
|
|
|
|
Engine type M28.41/47
|
Design
|
Single-plate
dry clutch with diaphragm spring, extended, mounted on engine hydraulic
operation
|
|
Pressure
plate
|
GMFZ
250
|
|
Contact
pressure
|
9900…11100
N
|
|
Clutch
disk
|
Ř 250
|
|
Nehmerzylinder
Kolben
|
Ř 22.2 mm (before 23.8 mm)
|
* The
clutch play cannot by checked at the clutch pedal because of the automatic
hydraulic adjustment.
On
the other hand perfect function of the clutch must be guaranteed by having a
play of 0.5 mm between the push rod and master cylinder piston.
This
play cannot by measured; it must be determined on the clutch pedal by sense
of feeling. On the pedal tread plate
it will be about 3 mm.
Torque Specifications for Clutch
|
Location
Nm (kpm)
|
Description
|
Thread
|
Material
|
Torque
|
|
Ring
gear –
intermediate
ring
|
Bolt
|
M
7 x 1
|
8.8
|
15
|
|
Guide
tube –
clutch/transmission
|
Bolt
|
M
6 x 1
|
8.8
|
10
|
|
Clutch
slave
cylinder
|
Bolt
|
M
8 x 1.25
|
8.8
|
23
|
|
Clamp/
central
shaft I and II
|
Clamping
bolt
|
M
10 x 1.5
|
12.9
|
80
|
|
Clutch
housing/
central
tube
|
Bolt
|
M
10 x 1.5
|
8.8
|
45
|
|
Engine/clutch
housing
|
Bolt
|
M
12 x 1.5
|
8.8
|
85
|
|
Clutch
housing/
cover
|
Bolt
|
M
8 x 1.25
|
8.8
|
23
|
|
Clutch/
flywheel
|
Bolt
(Socket
head bolt)
|
M
8 x 1.25
|
8.8
|
23
|
5-Speed-Manual Transmission Type G 28
|
Type
|
Equipment
|
installed in:
|
Model Year
|
|
G
28/10
|
5
speed
|
928
S Eur./R.o.W.
|
1985/86
|
|
G
28/11
|
5
speed
|
928
S USA
|
1985/86
|
|
G
28/12
|
5
speed
|
928
S4 Eur./R.o.W.
|
1987/88
|
|
G
28/13
|
5
speed
|
928
S4 USA/Japan
|
1987/88
|
|
G
28/55*
|
5
speed
|
928
S4 Club Sport ww
|
1988
|
|
|
|
928
GT ww
|
1989
|
*
limited slip differential fitted as standard (40%)
5
–Speed-Manual Transmission Type G 28
|
General Data
|
Manual Transmission Typ G 28.10/12/55
|
|
Design
|
Direct
transmission with layshaft
|
|
Ratios*
|
Z1
|
Z2
|
iz
Z2:Z1
|
ilay
33:22
|
iz
x ilay
|
|
1.
gear
|
17
|
44
|
2.5882
|
1.4545
|
3.7645
|
|
2.
gear
|
22
|
38
|
1.7272
|
1.4545
|
2.5122
|
|
3.
gear
|
26
|
32
|
1.2307
|
1.4545
|
1.7900
|
|
4.
gear
|
29
|
27
|
0.9310
|
1.4545
|
1.3541
|
|
5.
gear
|
direct
|
1.000
|
direct
|
1.0000
|
|
R.-gear
|
22
(30)
|
(30)
50
|
2.2727
|
1.4545
|
3.3056
|
|
Final
drive
|
Drive
pinion without hypoid displacement
|
|
Final
drive ratio
|
11:30
11:29
|
i
= 2.7272 (G 28.10/55)
i
= 2.6363 (G 28/12)
|
|
Transmission
oil
|
Multi-grade
gear lube SAE 75 W 90
API-classification
GL 5 (or MIL-L 2105 B)
|
|
Oil
capacities
|
85
models and earlier = approx. 3.8 liters
86
models onward = approx. 4.5 Liter
|
|
General Data
|
Manual Transmission Typ G 28.11/13
|
|
Design
|
Direct
transmission with layshaft
|
|
Ratios*
|
Z1
|
Z2
|
iz
Z2:Z1
|
ilay
33:21
|
iz
x ilay
|
|
1.
gear
|
17
|
44
|
2.5882
|
1.5714
|
4.0672
|
|
2.
gear
|
22
|
38
|
1.7272
|
1.5714
|
2.7142
|
|
3.
gear
|
26
|
32
|
1.2307
|
1.5714
|
1.9339
|
|
4.
gear
|
29
|
27
|
0.9310
|
1.5714
|
1.4629
|
|
5.
gear
|
direct
|
1.000
|
direct
|
1.0000
|
|
R.-gear
|
22
(30)
|
(30)
50
|
2.2727
|
1.5714
|
3.5714
|
|
Final
drive
|
Drive
pinion without hypoid displacement
|
|
Final
drive ratio
|
11:30
11:29
|
i
= 2.7272 (G 28.10/55)
i
= 2.6363 (G 28/12)
|
|
Transmission
oil
|
Multi-grade
gear lube SAE 75 W 90
API-classification
GL 5 (or MIL-L 2105 B)
|
|
Oil
capacities
|
85
models and earlier = approx. 3.8 liters
86
models onward = approx. 4.5 Liter
|
Z1
= Number of teeth on first gear wheel in the load path of the gear concerned
Z2
= Number of teeth on second gear wheel in the load path of the gear concerned
iz
= gear ratio
ivor
= layshaft ratio
|