E90Post
 


Coby Wheel
 
BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Differential Noise



Reply
 
Thread Tools Search this Thread
      06-25-2016, 12:10 AM   #1
Shrike360
First Lieutenant
154
Rep
345
Posts

Drives: 2009 E92 M3, 2011 Porsche CTT
Join Date: Mar 2015
Location: PDX, Oregon

iTrader: (0)

Differential Noise

Thought I would get a better response from this subforum.

Have a bit of noise from the rear end. When above about 40, get a kind of "wuh-wuh-wuh" that increases in frequency with speed. At certain speeds, it gets a special pitch that makes things a bit louder (i.e. from ~56-58, 71-73). I realize there's a bit of brake noise in the second vid, but fairly sure that isn't what is causing it. I topped up the diff fluid last weekend (it ended taking about 400ml), and it seemed to help.

Any idea what the issue is?


Appreciate 0
      06-25-2016, 12:51 AM   #2
Gohan335i7
Captain
United_States
310
Rep
766
Posts

Drives: 335i
Join Date: Nov 2015
Location: Florida

iTrader: (0)

Garage List
2010 335i  [5.00]
Appreciate 0
      06-25-2016, 01:58 AM   #3
Shrike360
First Lieutenant
154
Rep
345
Posts

Drives: 2009 E92 M3, 2011 Porsche CTT
Join Date: Mar 2015
Location: PDX, Oregon

iTrader: (0)

Not sure if the noise is normal or not. My dad's 335xi is much quieter on the road (he is on 17s, basically the only difference). Could potentially go to a different fluid, but I feel like that may be just trying to cover up a problem.
Appreciate 0
      06-25-2016, 10:51 PM   #4
Shrike360
First Lieutenant
154
Rep
345
Posts

Drives: 2009 E92 M3, 2011 Porsche CTT
Join Date: Mar 2015
Location: PDX, Oregon

iTrader: (0)

Took some videos from the interior today. I'm still of the belief that it is the differential making the noise.

Appreciate 0
      06-26-2016, 12:26 PM   #5
avocet
Major
229
Rep
1,150
Posts

Drives: 2007 328i 2011 X5d
Join Date: Sep 2010
Location: Vancouver bc

iTrader: (0)

your diff is definitely ill!!!

I am not sure how hard it is to source an xi diff, but i got my diff(for a regear) off ebay for my 328i for under $300 shipped, and was in excellent shape with smooth bearing and no funk in the fluid.

that resonating noise seems like a classic diff symptom to me.
Appreciate 0
      06-26-2016, 07:14 PM   #6
Shrike360
First Lieutenant
154
Rep
345
Posts

Drives: 2009 E92 M3, 2011 Porsche CTT
Join Date: Mar 2015
Location: PDX, Oregon

iTrader: (0)

Rear end is the same as any other manual 335i, so not awful to find. May either see if it could be rebuilt, or source one through ebay.
Appreciate 0
      06-26-2016, 11:50 PM   #7
Stream
T667YM86
Stream's Avatar
Russian Federation
63
Rep
244
Posts

Drives: E90 325i 05'
Join Date: Mar 2013
Location: Russia, Surgut

iTrader: (0)

I have similar sound in my 325i.
Hope it's wheel bearing, not differential =\
Appreciate 0
      06-27-2016, 12:07 AM   #8
avocet
Major
229
Rep
1,150
Posts

Drives: 2007 328i 2011 X5d
Join Date: Sep 2010
Location: Vancouver bc

iTrader: (0)

Quote:
Originally Posted by Shrike360 View Post
Rear end is the same as any other manual 335i, so not awful to find. May either see if it could be rebuilt, or source one through ebay.
Thought gearing was different. I may be wrong tho...
Appreciate 0
      06-27-2016, 09:39 AM   #9
Volasko
Colonel
Volasko's Avatar
Canada
517
Rep
2,451
Posts

Drives: 2006 E90 330i BSM 6MT
Join Date: Dec 2010
Location: Toronto

iTrader: (2)

Garage List
This should help you figure out the different gear ratios of all E9x's:

http://www.bokchoys.com/differential/GearRatios.htm
Appreciate 0
      06-28-2016, 07:07 PM   #10
Shrike360
First Lieutenant
154
Rep
345
Posts

Drives: 2009 E92 M3, 2011 Porsche CTT
Join Date: Mar 2015
Location: PDX, Oregon

iTrader: (0)

Quote:
Originally Posted by Stream View Post
I have similar sound in my 325i.
Hope it's wheel bearing, not differential =\
I'm having the dealer listen to it on Friday, before I order another differential. I'll update on what they say.
Appreciate 0
      07-02-2016, 03:33 AM   #11
Stream
T667YM86
Stream's Avatar
Russian Federation
63
Rep
244
Posts

Drives: E90 325i 05'
Join Date: Mar 2013
Location: Russia, Surgut

iTrader: (0)

Quote:
Originally Posted by Shrike360 View Post
I'm having the dealer listen to it on Friday, before I order another differential. I'll update on what they say.
Any news?
__________________
E90 325i 05MY, ZSP, Koni Sport, Eibach Pro-kit, BBS RK-II squared
Appreciate 0
      07-03-2016, 12:44 PM   #12
Shrike360
First Lieutenant
154
Rep
345
Posts

Drives: 2009 E92 M3, 2011 Porsche CTT
Join Date: Mar 2015
Location: PDX, Oregon

iTrader: (0)

Dealer says it's my rear left wheel bearing that was the cause, diff was apparently quiet. Trying to get an independent to do the job, because I think $950 out the door was a bit much. Already got a quote for $550 OTD, so will probably go with him.
Appreciate 0
      07-03-2016, 01:12 PM   #13
Shrike360
First Lieutenant
154
Rep
345
Posts

Drives: 2009 E92 M3, 2011 Porsche CTT
Join Date: Mar 2015
Location: PDX, Oregon

iTrader: (0)

Tag you here to so you get a notification.

Quote:
Originally Posted by Stream View Post
Any news?
As a side note, didn't know that when an xi is in the air, you can make sure that all four wheels spin by turning off DTC.
Appreciate 0
      07-03-2016, 01:55 PM   #14
avocet
Major
229
Rep
1,150
Posts

Drives: 2007 328i 2011 X5d
Join Date: Sep 2010
Location: Vancouver bc

iTrader: (0)

Quote:
Originally Posted by Shrike360 View Post
Dealer says it's my rear left wheel bearing that was the cause, diff was apparently quiet. Trying to get an independent to do the job, because I think $950 out the door was a bit much. Already got a quote for $550 OTD, so will probably go with him.
Ah lol! I assumed you had isolated the noise to the diff when you had it on jacks!
Appreciate 0
      07-08-2016, 06:06 PM   #15
Shrike360
First Lieutenant
154
Rep
345
Posts

Drives: 2009 E92 M3, 2011 Porsche CTT
Join Date: Mar 2015
Location: PDX, Oregon

iTrader: (0)

Quote:
Originally Posted by avocet View Post
Ah lol! I assumed you had isolated the noise to the diff when you had it on jacks!
Thought so too, dealer wasn't even sure what it was when they first took it.

As an update, got the wheel bearing replaced. Nice and quiet in the car, now.
Appreciate 1
      07-08-2016, 09:26 PM   #16
Meeni
Gateropode
Meeni's Avatar
316
Rep
2,850
Posts

Drives: BMW 330i 06
Join Date: Apr 2012
Location: TN

iTrader: (0)

Usually a woo woo noise that follows speed is a wheel bearing, not the diff. Good luck.
Appreciate 0
      12-28-2020, 07:38 AM   #17
ramp
Private First Class
25
Rep
129
Posts

Drives: E91, Lemans Blue
Join Date: Feb 2010
Location: CT

iTrader: (0)

Garage List
2011 BMW 328i  [0.00]
Interesting thread. A couple of months had all fluids changed in my e91, manual 6 speed. Mechanic said the rear differential makes noise at 40 mph. At the shop they said we see this all the time. Do not rebuild, just replace with a good used one. I'll check into this after winter.
Appreciate 0
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -5. The time now is 01:52 PM.




e90post
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST