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E46 M3 (2001-2006)

 
 
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Old 11-11-2011, 11:27 AM
BlackStarMiG BlackStarMiG is offline
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Location: Phoenix, AZ
 
Join Date: Aug 2011
Posts: 20
Mein Auto: BMW E46 M3
Exclamation Loud Diff Clunk

ok its made that sound since i bought the car in February but it wasn't this bad it happens when I accelerate from a stop and when high rpm shifts are made. at first i thought it was the normal m3 diff clunk but eventually it got to the point where when i made high rpm shifts or accelerated fast it felt light someone was hitting the underbody of my car with a hammer ( a big hammer) now im just afraid of driving hard or even gong any higher than S1 on my SMG its been like this for a while and this morning i decided to check if it was the rear diff bushings so i lifted the back end and tried ti see if the diff had any movement and it turns out they are still good there wasn't any movement with the diff also the subframe bushings are good as well and so is the Guibi or whatever u call it the rubber spacer between the driveshaft and the Diff. so i guess my question is:

1. Where else is the sound coming from it feels like mid to rear clunk.

2. Could it be the Driveshaft center support?

3. i need to fix this please help
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