Mysterious noise

g852grant · 12-07-2016, 08:32 PM

Hi all,

A new noise popped up a little while ago and I'm trying to figure out what it is. The sound is somewhat similar to a wheel bearing going out, but is a lot more constant (not so much of a wub-wub-wub noise and more of a wuuuuuuuu noise) The noise only happens between 55 and 85 mph and comes from the back of the car.

I had been doing some research, and it looks like the driveshaft can make this noise if it goes bad. I also think it could be the center support bearing, guibo, differential or one of the drive axles.

Any ideas?

For reference, it's a manual 330i with an auto 328i diff with a CDV delete. about 131,000 miles on it.

rjahl · 12-07-2016, 09:52 PM

Quote:

Originally Posted by g852grant

Hi all,

A new noise popped up a little while ago and I'm trying to figure out what it is. The sound is somewhat similar to a wheel bearing going out, but is a lot more constant (not so much of a wub-wub-wub noise and more of a wuuuuuuuu noise) The noise only happens between 55 and 85 mph and comes from the back of the car.

I had been doing some research, and it looks like the driveshaft can make this noise if it goes bad. I also think it could be the center support bearing, guibo, differential or one of the drive axles.

Any ideas?

For reference, it's a manual 330i with an auto 328i diff with a CDV delete. about 131,000 miles on it.

Check your tires.

dstrickland · 12-07-2016, 10:06 PM

Quote:

Originally Posted by rjahl

Quote:

Originally Posted by g852grant

Hi all,

A new noise popped up a little while ago and I'm trying to figure out what it is. The sound is somewhat similar to a wheel bearing going out, but is a lot more constant (not so much of a wub-wub-wub noise and more of a wuuuuuuuu noise) The noise only happens between 55 and 85 mph and comes from the back of the car.

I had been doing some research, and it looks like the driveshaft can make this noise if it goes bad. I also think it could be the center support bearing, guibo, differential or one of the drive axles.

Any ideas?

For reference, it's a manual 330i with an auto 328i diff with a CDV delete. about 131,000 miles on it.

Check your tires.

That's the only thing it could be right? What else makes a wuuuu wuuu wuuu instead of a wubb wubb wubb...HA.

Haha, hard to tell from your descriptors, as rjahl mentioned, check your tires(tread first, then balancing), if they check out, get a video or something.

g852grant · 12-07-2016, 11:21 PM

Quote:

Originally Posted by dstrickland

That's the only thing it could be right? What else makes a wuuuu wuuu wuuu instead of a wubb wubb wubb...HA.

Haha, hard to tell from your descriptors, as rjahl mentioned, check your tires(tread first, then balancing), if they check out, get a video or something.

okay, so imagine you have a subwoofer that is stuck on one tone, only changing in volume.

3002 tii · 12-08-2016, 12:17 AM

Bent rim or wheel out of balance is my guess

12-07-2016, 08:32 PM	#1
g852grant New Member 4 Rep 8 Posts Drives: 2006 e90 330i Join Date: Jun 2015 Location: Twin Cities, Minnesota iTrader: (0)	Mysterious noise Hi all, A new noise popped up a little while ago and I'm trying to figure out what it is. The sound is somewhat similar to a wheel bearing going out, but is a lot more constant (not so much of a wub-wub-wub noise and more of a wuuuuuuuu noise) The noise only happens between 55 and 85 mph and comes from the back of the car. I had been doing some research, and it looks like the driveshaft can make this noise if it goes bad. I also think it could be the center support bearing, guibo, differential or one of the drive axles. Any ideas? For reference, it's a manual 330i with an auto 328i diff with a CDV delete. about 131,000 miles on it.
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12-08-2016, 12:17 AM	#5
3002 tii Lieutenant General 2482 Rep 12,691 Posts Drives: Z4 M, X5, GX460 Join Date: Apr 2008 Location: CT iTrader: (100) Garage List E86 Z4 M [10.00] F15 X5 xDrive35i [9.17] F10 550i (Retired) [9.17] E85 Z4 M (Retired) [9.41] F25 X3 xDrive35i (R ... [9.43] E82 135is (Retired) [9.56] E90 328i xDrive (Re ... [9.25] E86 Z4 3.0si (Retired) [8.93]	Bent rim or wheel out of balance is my guess __________________ Follow for latest mods
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