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Premium Member
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834 Posts
Discussion Starter · #1 ·
I just got my car back from having a new clutch installed.
It is holding thats for sure....but around 4 grand the shifter
is vibrating VERY bad. The car also seems to either have a
miss @ 900 RPM or a vibration. It smothes out @ 600 were
it idle's fine. What give could they have jacked the goemitry
or flywheel up? If so could it jack the motor up by throwing
it out of balance? I can live with it I just want to make sure
I don't hurt anything.
 

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Premium Member
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834 Posts
Discussion Starter · #4 ·
Yea they resurfaced the flywheel they said it had some "hot spots" on it but it cleaned up OK. The clutch is pretty much stock
10.5 with pressure plate & throw out bearing from D&D motor
sports. They also fixed the front seal on the T45 that was
leaking the reason the old clutch was slipping it was covered
in fluid. I think the problem @900 RPM is computer related
they had the battery disconnected for over a week. I just
want to make sure a 300$ clutch don't cost me 4K$ in motor
repairs by throwing the balance off.

The drive shaft.....how can I check if it's jacked or not?

That would be a easy cheap fix.......but how did they throw it
out of balance?
 

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10,576 Posts
If you've got a stock driveshaft and pinion, look onthe bottom for some yellow dot of form of marking. Both the yoke and the driveshaft should have the marking on the same side. Driveshaft vibration typically doesn't happen until 3000-5000rpms (where depends on gears you have, 2.73 will be upwards of 5k while 4.56's will vibrate closer to 3k)
 

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10,576 Posts


If you're vibrating at 4k, I'm pretty sure you just need to flip your driveshaft over 180 degrees.

Here's why I don't think it's the flywheel:
If the flywheel was mis-index'd when it was reinstalled, you would feel it at ALL rpm's because it would throw off the whole balance of the engine. You'd definately be feeling it at idle as it's part of the balance of the engine internals.
 
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