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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 03-07-2013, 11:40 AM   #1
lkstaack
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New Clutch, New Vibration: Personal Experience?

My 330i 6-Speed has a low-speed vibration that I feel from the steering wheel and seat. I just installed a new UUC lightweight flywheel / clutch package, UUC transmission mounts (not race), and guibo. The vibration starts when the car first starts to move and disappears at about 30mph. Does anyone have personal experience with a similar issue?

I noticed the vibration as well as a buzzing rattle coming from the transmission tunnel on my first test drive. Thinking the rattle may come from the heat shield, I removed the exhaust and heat shield again. The shield seemed to be good, but I noticed that the transmission support cross member did not fit exactly as when I removed it; the old grease marked where it once was attached, and it was about 5mm off. I loosened all of the transmission support nuts and center bearing cap, and used a pry bar to re-position the cross member to its former location. I was able to get it close, its now about 1mm off. Consequently, the rattle disappeared, but I stall have the vibration.

Here is a video taken shortly after my first test drive and before the rattle went away.


So, anyone have a similar problem? I can live with the vibration, but would rather not.
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Old 03-07-2013, 12:05 PM   #2
lcoleman
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Polyurethane transmission mounts are almost guaranteed to add at least a little NVH.
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Old 03-07-2013, 12:15 PM   #3
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crap aftermarket parts
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Old 03-07-2013, 03:42 PM   #4
Rob Levinson * UUC Motorwerks
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Torque spec on the transmission mounts is very important; over-tightening them will cause a vibration. Torque spec is 15ft-lbs which is only a little more than finger-tight.
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Old 03-07-2013, 05:02 PM   #5
lkstaack
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Originally Posted by Rob Levinson * UUC Motorwerks View Post
Torque spec on the transmission mounts is very important; over-tightening them will cause a vibration. Torque spec is 15ft-lbs which is only a little more than finger-tight.
Thanks, Rob. I torqued the bottom nuts to 16lbs, but I guessed on the top nuts because I couldn't get a torque wrench in there. Perhaps they are a little tight.
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Old 03-25-2013, 10:54 AM   #6
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Does it do that same thing if you're in neutral

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