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Originally Posted by PieintheSky
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Read page 16 in your "Getting to Know Your 2007 SKY" booklet.
It happens only to cars equipped with the LSD and it is normal.
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No, they didn't say so.
a) the rear axle maybe equipped with a limited slip diff
b) with man. trans you can do abrupt torque transfer
(low gear shifting at low engine speed) or abrupt de-clutching.
Clunking can accure with or without a limited-slip-unit.
A
bit of clunking is normal with front engine - rear wheel drive - concept combined with manual trannys. With autotrans the shifting is smoother and will be damped by the oil-filled torque converter.
The clunk can be caused by
- the gear slack (working loose) of the diff gears
- the cardan shaft (working loose in the cardan joints)
- the manual tranny gear slack/working loose of the gears.
Another point to consider is that a roadster is an "open" car, the same noise makes a louder impression than in a closed and good isolated cars.
You can test the working loose of the diff and the cardan shaft yourself:
Lift up one rear tyre a bit, block a front wheel, put a gear in, loosen emergency brake.
If you turn that lifted wheel in both directions, you may hear the clunk and you can messure the "free" angle at the wheel. If you want to know the part of the free angle caused by the diff, you have to block the cardan shaft at the entrance of the diff.
If you want you can compare this testing with a car with same driving concept witch doesnīt clunk.
I donīt want to say GM/Getrag made a good job but to decide if - at first the real reason must be found.