New 2009 2010 BMW Z4 - ZPOST
BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read


Go Back   New 2009 2010 BMW Z4 - ZPOST > BMW Z4 Forum (E89) > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications

Post Reply
 
Thread Tools Search this Thread
      01-24-2019, 05:28 PM   #1
impulsE89
Private
18
Rep
68
Posts

Drives: E89 BMW
Join Date: Sep 2017
Location: USA South

iTrader: (0)

Diff whine?

e89 2009 35i whine is most noticeable when coasting down from about 60mph. It is a fairly low volume only noticeable when the pavement is smooth with low tire noise. I wish I could try another car because it could even be a normal diff gear whine.
Any thoughts?
Thanx
Appreciate 0
      02-05-2019, 09:59 AM   #2
Asbjorn
Captain
Asbjorn's Avatar
China
67
Rep
822
Posts

Drives: Z4 N54 DCT (VTT GC lites)
Join Date: Mar 2012
Location: European in China

iTrader: (0)

If it is diff whine, and it is the loudest at 60mph when on throttle, then it should occur again at 110-130mph - even louder. Try and test that.

Also diff whine is typically more audible off throttle during engine braking, especially from high speed. It then quiets down when you get back on the throttle.

Normally you cant hear a healthy diff on a stock Z4. You need stiffer bushings and subframe mounts to be able to hear it. If it is indeed falling apart, then don't worry, it will happen gradually and the sound will just get louder and louder over time.
Appreciate 1
Post 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 08:05 PM.




zpost
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2020, 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