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      02-04-2024, 08:07 PM   #3
a5m
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Drives: 2011 BMW E90 M3
Join Date: Jan 2023
Location: Chitown

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Quote:
Originally Posted by iamtrashman View Post
Are you asking to determine if you need to replace yours? Or did you replace yours and it is now vibrating?

If you recently replaced it and it is vibrating you may have reassembled the driveshaft out of phase. It is a balanced assembly that you need to mark before disassembly.

If you are having vibrations under throttle and haven't replaced that stuff, especially in the shifter area it could be CSB or flex disc/guibo.

Both the flex disc and CSB have service lives, if you are around 150,000km or more it is likely time to replace that stuff anyway. If you get under there to replace it and you find something else it is still absolutely worth replacing.

I replaced all of that stuff and my transmission mounts on mine shortly after buying the car. The stuff I took off seemed fine, but I had to remove the driveshaft to install an RTD shifter. It was a "while youre in there" thing. Pretty easy job in the end.
Hey thanks for the reply.

No I haven't replaced anything yet and am trying to determine what is causing the vibration.

Honestly I'd be inclined towards replacing the CSB as a general maintenance item but I'm afraid of it giving me a hard time. Isn't a press required, and or specialized tools/techniques?

The vibration seems to come from the rear end. I haven't really noticed it in the shifter area but haven't paid close enough attention either. Will do next time. The rattle/clunking at low speeds is definitely near the shifter area.

The car had the clutch replaced at around 56k. I'm suspecting maybe driveshaft wasn't reinstalled properly, even though it was done by the dealer.
Appreciate 0