Welcome to the North American Subaru Impreza Owners Club Thursday October 22, 2020
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Subaru Models > Impreza Forum

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, 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 free, fast and simple, so please join our community today!

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







* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Reply
 
Thread Tools Display Modes
Old 05-07-2020, 12:21 AM   #1
zpmada
Scooby Newbie
 
Member#: 511116
Join Date: Jan 2020
Default Subaru impreza humming from the back

Hi

Have an impreza base model that is humming from the back. Doesnt seem to be getting worse. Been this way since I bought it used so I don't know the full history. Loudest at 40-50mph. Quieter above and below those speeds. Turning doesn't change the consistency or sound. It's a steady humming, not a pulsing sound.

Rear diff fluid and atf fluid changed (genuine Subaru fluids and gear oil) with no improvement or worsening of the sound. Car has 105k miles.
Putting the automatic in neutral while coasting doesn't change the sound.

No uneven wear in the tires.

Any idea?

Thanks.
* Registered users of the site do not see these ads.

Last edited by zpmada; 05-07-2020 at 12:27 AM.
zpmada is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 05-07-2020, 08:06 AM   #2
Cujo31
Scooby Newbie
 
Member#: 19843
Join Date: Jun 2002
Chapter/Region: MWSOC
Location: St. Louis
Vehicle:
2000 2.5 RS Sedan
2016 Base 5MT VRP

Default

even though you say turning doesn't change the sound, i'd probably replace the wheel bearings since it's a common problem for them to go bad

alignment and balance, make sure your rear differential bushings aren't cracked/broken... check the CV axles, maybe replace 'em...

hard to tell without seeing/hearing it in person... also really look around for anything rubbing on the underside..

good luck
Cujo31 is offline   Reply With Quote
Old 05-13-2020, 12:17 AM   #3
Salle071
Scooby Newbie
 
Member#: 514709
Join Date: May 2020
Default

Also check for tire cupping. Happened on my Mitsubishi, could not properly diagnose until dealer borrowed wheels from another car.
Salle071 is offline   Reply With Quote
Reply

Thread Tools
Display Modes

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
Forum Jump

All times are GMT -4. The time now is 07:45 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2020 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.