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Porsche 930 TURBO - 1989 GENERAL DATA Manual page 99

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Differential,
Final
Drive
Caution
To prevent changing the locking effect, it is
essential that the discs be reinstalled in their
proper positions.
Note
During the model year 1976, inner splined discs
and outer splined discs will be modified.
The present inner splined molybdenum coated
discs of different thicknesses will be replaced by
a single molybdenum coated disc.
See chart:
Present Parts
901.332.551.21
(2.0 mm thick)
901.332.551.22
(1,9 mm thick)
901.332.551.23 (2.1 mm thick)
Replacement Part
917.332.551.10
(2.0 mm thick)
Note
Wavy outer splined discs must face housing or
housing cover.
5. To measure locking effect of limited slip
differential,
install two drive flanges and
clamp one (with two bolts inserted) in a vise.
Install locally manufactured adaptor and turn
differential with torque wrench.
Check that torque is 4 -8 mkg (29 -58 ft lb).
To meet or change the torque requirements of
the limited slip differential, the following outer
splined discs are available:
917.332.552.10 (1.9 mm thick)
917.332.552.11
(2.0 mm thick)
917.332.552.12 (2.1 mm thick)
The wavy outer splined discs- 901.332.552.12
(2.0 mm thick)- remain in use.
The torque can be changed by installing the old
inner splined discs of different thicknesses with
the new outer splined discs.
Notes
If torque does not meet specifications, change
it by installing appropriate inner discs.
Inner discs with thickness I, 9 mm, 2, 0 mm
and 2,1 mm (0,075, 0,079 and 0,083 in.) are
available.
If the thickest discs are installed and the torque
is still not correct, all discs are worn and must
be replaced.
.

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9301977 9301978 930911 turbo 1989