weird clunking noise

N54_e90 · 12-17-2017, 04:17 PM

2011 323i

i did some wot pulls today and shortly after i started getting this clunking noise - it seemed to be coming from the back and once the noise came and i tried to do more pulls it seemed like i was hitting rev limiter at 4k (i have a straight pipe exhaust)

the noise gets worse as u go up the rpms im not sure what it could be. Feels like a knocking but not the engine, maybe the differential, suspension component or tranny? i got no lights though.

i pulled off to the side and turned the car off for 30 sec then back on and the noise went away and it was driving fine. any ideas??

Delusive · 12-23-2017, 07:05 PM

Any videos of the noise? it can be anything from suspension clunking, exhaust pipes shaking or hanging, etc. Maybe something else since you said it went away after turning the car off.

N54_e90 · 12-24-2017, 04:56 PM

Didn't get a video of it at the time, noise would get worse as rpms got higher, sounded like a knocking/ticking sound.

I'm suspecting diff because idk it feels like the car is slipping sometimes in the back (but not the wheels/traction), can the rear diff slip is a tooth or spider gear is broken or fucked?

It drives fine other than that and the noise hasn't come back even after more WOT pulls, but I'm gonna get a rear diff oil change next month and hope to metal shavings come out.

12-17-2017, 04:17 PM	#1
N54_e90 Don 46 Rep 299 Posts Drives: '09 E90 335xi Family Sedan Join Date: Jan 2017 Location: Your Mother's House iTrader: (0)	weird clunking noise 2011 323i i did some wot pulls today and shortly after i started getting this clunking noise - it seemed to be coming from the back and once the noise came and i tried to do more pulls it seemed like i was hitting rev limiter at 4k (i have a straight pipe exhaust) the noise gets worse as u go up the rpms im not sure what it could be. Feels like a knocking but not the engine, maybe the differential, suspension component or tranny? i got no lights though. i pulled off to the side and turned the car off for 30 sec then back on and the noise went away and it was driving fine. any ideas??
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12-23-2017, 07:05 PM	#2
Delusive Lieutenant Colonel 136 Rep 1,598 Posts Drives: Bagged E92 Join Date: May 2012 Location: Bay Area, CA iTrader: (9)	Any videos of the noise? it can be anything from suspension clunking, exhaust pipes shaking or hanging, etc. Maybe something else since you said it went away after turning the car off. __________________ Instagram Youtube
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12-24-2017, 04:56 PM	#3
N54_e90 Don 46 Rep 299 Posts Drives: '09 E90 335xi Family Sedan Join Date: Jan 2017 Location: Your Mother's House iTrader: (0)	Didn't get a video of it at the time, noise would get worse as rpms got higher, sounded like a knocking/ticking sound. I'm suspecting diff because idk it feels like the car is slipping sometimes in the back (but not the wheels/traction), can the rear diff slip is a tooth or spider gear is broken or fucked? It drives fine other than that and the noise hasn't come back even after more WOT pulls, but I'm gonna get a rear diff oil change next month and hope to metal shavings come out.
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