Rubbing, humming, vibration noise from rear

ngs · 08-26-2018, 12:25 AM

Getting a slight high pitched humming/rubbing noise but only from 750-1000 rpms at slow speeds accelerating and turns. At times I can feel/ hear vibration coming from the rear. Happens intermittent too! Want to take it in before warranty is up. any ideas?

Car has CCB and is DCT could it be brakes? Differential?

RickFLM4 · 08-26-2018, 06:05 AM

You should get it checked if not sure what it is, but sounds like it may be the CCBs. I had them on my 2015 and they can be noisy, including the rubbing-like noise you described. You'll find some threads here about CCBs, including CCB noise:
https://f80.bimmerpost.com/forums/fo...play.php?f=532.

Poiseuille · 08-26-2018, 02:49 PM

If I may: how many miles are on your car and has the diff fluid been changed other than at the 1200m service?

ngs · 08-26-2018, 05:38 PM

Quote:

Originally Posted by Poiseuille

If I may: how many miles are on your car and has the diff fluid been changed other than at the 1200m service?

Car has 10,000 miles. Diff fluid has not been changed since

Poiseuille · 08-26-2018, 06:39 PM

Quote:

Originally Posted by PWRSTEVE

Quote:

Originally Posted by Poiseuille

If I may: how many miles are on your car and has the diff fluid been changed other than at the 1200m service?

Car has 10,000 miles. Diff fluid has not been changed since

Assuming you mean "....since the 1200m service" then it's not a diff maintenance issue. I don't have CCB so I can't speak to that although there do seem to be stories about various CCB noises. My first concern would be the diff regardless of maintenance history, and I'd be off to the dealer. If it's the sort of sound you could record on your phone, then I would do that. Good luck.

ngs · 09-03-2018, 12:15 AM

Yeah brought it to the dealer they had it for 3 days but said the noise/vibration was normal.... seems to happen more when the car is warm

RickFLM4 · 09-03-2018, 06:48 AM

Quote:

Originally Posted by F80STEVE

Yeah brought it to the dealer they had it for 3 days but said the noise/vibration was normal.... seems to happen more when the car is warm

Did they identify the source?

jbwolfe · 09-11-2018, 03:01 PM

Not certain about what you're hearing, but aren't these diffs equipped with electronically controlled clutch plates? I often hear them "groaning" under power when not in a straight line- like what you've described. I would guess what you're hearing is the differential doing its thing and is an expected and normal noise.

08-26-2018, 12:25 AM	#1
ngs Private First Class 26 Rep 148 Posts Drives: F80 Join Date: Nov 2008 Location: SOCAL iTrader: (0)	Rubbing, humming, vibration noise from rear Getting a slight high pitched humming/rubbing noise but only from 750-1000 rpms at slow speeds accelerating and turns. At times I can feel/ hear vibration coming from the rear. Happens intermittent too! Want to take it in before warranty is up. any ideas? Car has CCB and is DCT could it be brakes? Differential?
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08-26-2018, 06:05 AM	#2
RickFLM4 Brigadier General 10981 Rep 4,821 Posts Drives: M4 Join Date: Jul 2015 Location: PB County, FL iTrader: (0)	You should get it checked if not sure what it is, but sounds like it may be the CCBs. I had them on my 2015 and they can be noisy, including the rubbing-like noise you described. You'll find some threads here about CCBs, including CCB noise: https://f80.bimmerpost.com/forums/fo...play.php?f=532. __________________ Current: 2018 SO/SS F83 ZCP Gone: 2015 SO/SO F82
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08-26-2018, 02:49 PM	#3
Poiseuille Brigadier General 5393 Rep 3,737 Posts Drives: 2016 M4 DCT Tanzanite/Amaro Join Date: Oct 2016 Location: Princeton iTrader: (0) Garage List [0.00] [10.00]	If I may: how many miles are on your car and has the diff fluid been changed other than at the 1200m service?
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09-03-2018, 12:15 AM	#6
ngs Private First Class 26 Rep 148 Posts Drives: F80 Join Date: Nov 2008 Location: SOCAL iTrader: (0)	Yeah brought it to the dealer they had it for 3 days but said the noise/vibration was normal.... seems to happen more when the car is warm
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09-11-2018, 03:01 PM	#8
jbwolfe New Member 11 Rep 22 Posts Drives: 2015 M3 Join Date: Apr 2016 Location: Chicago iTrader: (0)	Not certain about what you're hearing, but aren't these diffs equipped with electronically controlled clutch plates? I often hear them "groaning" under power when not in a straight line- like what you've described. I would guess what you're hearing is the differential doing its thing and is an expected and normal noise. __________________ Have you ever noticed that anybody driving slower than you is an idiot, and anyone going faster than you is a maniac? '15 M3 6MT MetGrey 19s: hull strike 2018 2018 M3 TanzBlue DCT
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