E46 BMW Social Directory E46 FAQ 3-Series Discussion Forums BMW Photo Gallery BMW 3-Series Technical Information E46 Fanatics - The Ultimate BMW Resource BMW Vendors General E46 Forum The Tire Rack's Tire Wheel Forum Forced Induction Forum The Off-Topic The E46 BMW Showroom For Sale, For Trade or Wanting to Buy

Welcome to the E46Fanatics forums. E46Fanatics is the premiere website for BMW 3 series owners around the world with interactive forums, a geographical enthusiast directory, photo galleries, and technical information for BMW enthusiasts.

You are currently viewing our boards as a guest which gives you limited access to view most discussions and access our other features. By joining our free community you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is fast, simple and absolutely free so please, join our community today!

If you have any problems with the registration process or your account login, please contact contact us.

Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

Reply
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 10-04-2012, 08:40 PM   #1
subieworx
Registered User
 
Join Date: Nov 2011
Location: cincinnati
Posts: 72
My Ride: ZHP, 335, E53, E30
Slight vibration from rear of car

I picked up a ZHP a couple weeks ago and so far love it. They car has 150000 miles, but is in pretty good shape mechanically and cosmetically. The one thing that has really been bugging me about the car though is a vibration I have above 55 mph.

It is a very mild vibration that comes from the rear of the car. It is not noticeable until 55 mph and increases slightly up to about 70 where it seems to level off. If I go wide open with the throttle the vibration seems to lessen or go away completely (tough to tell over exhaust). If I let off the throttle and coast it gets a little worse. If I continue to coast it will lessen as the speed decreases till 55 when I can't really tell it's there.

I have done quite a bit of searching on the issue and taken the usual steps for fixing. So far I have replaced the following:

guibo
CSB
rear axles
rear wheel bearings
tried known good wheels/tires

All that is left that could be causing it is the driveshaft and rear diff. The rear diff was replaced by the previous owner about 2 years ago with a 3.46 unit with unknown mileage. He said the diff bushings were changed at the same time, but I do get a clunk from the rear with aggressive throttle applications or when sitting at a stop and engaging a gear. Diff bushings look fine, but definitely look older than 2 years.

I want the input of the people in the know before I go down the path of replacing the driveshaft or rear diff.

Last edited by subieworx; 10-04-2012 at 08:41 PM.
subieworx is offline   Reply With Quote
Ads by Google

Guests, get your FREE E46Fanatics.com membership to remove this ad.
Old 10-07-2012, 10:12 AM   #2
BMW_CRAZY
Registered User
 
Join Date: Nov 2008
Location: NEW JERSEY
Posts: 30
My Ride: 2009 328i LCI BMW
Just to make sure check that subframe because of that clunk...

Sent from my PC36100 using Bimmer App

Last edited by BMW_CRAZY; 10-07-2012 at 10:12 AM.
BMW_CRAZY is offline   Reply With Quote
Old 10-07-2012, 10:17 PM   #3
bigjae1976
Registered User
 
bigjae1976's Avatar
 
Join Date: Dec 2003
Location: Earth
Posts: 11,480
My Ride: A car
Send a message via MSN to bigjae1976
Did you align the car? I can tell if my car's alignment is off or if a tire is low because the car will handle like crap and/or have a similar kind of vibration.
bigjae1976 is offline   Reply With Quote
Old 11-06-2012, 11:24 AM   #4
Beamer Creamer
Registered User
 
Join Date: Sep 2012
Location: Canada
Posts: 270
My Ride: 2005 bmw m3
Take out drive shaft and tow to see if noises there.
Beamer Creamer is offline   Reply With Quote
Old 11-07-2012, 05:52 PM   #5
BartenderPlease
OEM ///Member
 
BartenderPlease's Avatar
 
Join Date: Sep 2006
Location: FL
Posts: 9,370
My Ride: 328i Sport
Check all driveline mounts. Rear subframe area, transmission, and engine. Along side your compiled list.
__________________
Genuine New Parts FS
CCV valve

image
AERA Hi-Perf Engine Builder
| BBS | FK | Rogue Eng | K&N | Exhaust | 330i Brakes |
| b30 manifold | ported head | FX-R/Orion V4 | LEDs |
| Alcantara | Khoalty Knob | JL Audio |


BartenderPlease is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
Censor is OFF





All times are GMT -5. The time now is 01:36 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
(c) 1999 - 2011 performanceIX Inc - privacy policy - terms of use