Welcome to the North American Subaru Impreza Owners Club Friday March 29, 2024
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Go Back   NASIOC > NASIOC Technical > Transmission (AT/MT) & Driveline

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 02-27-2018, 08:38 PM   #1
BugeyeZo
Scooby Newbie
 
Member#: 462089
Join Date: Jan 2017
Default Please help !! Rear end popping sound while accelerating

What's up guys. So I swapped in a 2004 sti drivetrain into my 2003 Bugeye. It ran great and still does. But for w.e reason I get this clunking/ popping sound coming from some where in the rear end (sounds like driver side) when I accelerate. It gets noticeably worse when there is 4 ppl in the car. It will go away sometimes when the car has warmed up for a bit. Sounds like someone is snaking my drivetrain with a mallet in a consistent way.

Almost all bushing have been replaced to polyurethane. And lateral links are all whiteline. I have apexi coilovers and whiteline sway bars with alloy sway bar brackets. I Just rebuilt the rear dif (r180) a couple months ago because I could have sworn it was the rear diff. But even after doing all that the noise is still there. Also just took apart the whole driver side rear end in hopes of finding something broken and saw nothing. The axle seemed alright. No ripped boots. The coilover seemed healthy (25,000 miles on them).The only thing I haven't changed are the bushings in the trailing arms or the rear wheel bearings. But the bearing seem to be in good condition and spin freely and have no play. I'm lost. If anyone has had this problem or has an idea please save me lol.
* Registered users of the site do not see these ads.
BugeyeZo is offline   Reply With Quote
Sponsored Links
* Registered users of the site do not see these ads.
Old 03-01-2018, 04:59 PM   #2
fleezy
Scooby Newbie
 
Member#: 436768
Join Date: Dec 2015
Chapter/Region: E. Canada
Location: Toronto
Vehicle:
2004 WRX
Silver

Default

when does the clunk happen? when you're shifting? when u hit a bump?
fleezy is offline   Reply With Quote
Old 03-01-2018, 05:22 PM   #3
Z3RO
Scooby Specialist
 
Member#: 87542
Join Date: May 2005
Chapter/Region: SCIC
Location: Bruh
Vehicle:
2002 Bugeye
PSM

Default

what rear diff are you running?
Z3RO is offline   Reply With Quote
Old 03-02-2018, 12:37 AM   #4
BugeyeZo
Scooby Newbie
 
Member#: 462089
Join Date: Jan 2017
Default

Quote:
Originally Posted by fleezy View Post
when does the clunk happen? when you're shifting? when u hit a bump?


When I accelerate hard it happens.
BugeyeZo is offline   Reply With Quote
Old 03-02-2018, 12:39 AM   #5
BugeyeZo
Scooby Newbie
 
Member#: 462089
Join Date: Jan 2017
Default

Quote:
Originally Posted by Z3RO View Post
what rear diff are you running?


R180
I just replaced that trailing arm bushings because they were the last rubber bushing on the car lol. Didn't help at all
I'm beginning to think it's a bad axle.
Will update when I put the new one in
BugeyeZo is offline   Reply With Quote
Old 03-02-2018, 08:32 AM   #6
Charlie-III
NASIOC Supporter
 
Member#: 30669
Join Date: Dec 2002
Chapter/Region: Tri-State
Location: USA, North NJ, 07456
Vehicle:
1998 Legacy 2.5GT
Silver Sleeper BK, 5MT

Default

So this clunk started after the drivetrain swap, correct?
Were these parts OK in the last car?
Were the coilovers swapped in at the same time?

Let's assume the above is all "yes", have you checked torque on things like the rear subframe, pry on things to make sure they are actually tight and not just hardware that bottomed out or got stuck?
Charlie-III is online now   Reply With Quote
Old 03-03-2018, 09:37 PM   #7
BugeyeZo
Scooby Newbie
 
Member#: 462089
Join Date: Jan 2017
Default

Quote:
Originally Posted by Charlie-III View Post
So this clunk started after the drivetrain swap, correct?
Were these parts OK in the last car?
Were the coilovers swapped in at the same time?

Let's assume the above is all "yes", have you checked torque on things like the rear subframe, pry on things to make sure they are actually tight and not just hardware that bottomed out or got stuck?


No sir. The clunk started about a year after the swap.
I already had the coilovers before the swap.
Everything looks and seems ok. The noise goes away after some driving. Maybe not totally gone but not nearly as loud as when I first get In it.
BugeyeZo is offline   Reply With Quote
Old 03-05-2018, 08:45 AM   #8
Charlie-III
NASIOC Supporter
 
Member#: 30669
Join Date: Dec 2002
Chapter/Region: Tri-State
Location: USA, North NJ, 07456
Vehicle:
1998 Legacy 2.5GT
Silver Sleeper BK, 5MT

Default

Quote:
Originally Posted by BugeyeZo View Post
No sir. The clunk started about a year after the swap.
I already had the coilovers before the swap.
Everything looks and seems ok. The noise goes away after some driving. Maybe not totally gone but not nearly as loud as when I first get In it.
So you did the swap over a year ago and the clunk is recent?

Since it's not a clunk going over bumps/potholes, and it's been fine, yes, could be an axle. I'm stil leaning towards a bushing is loose or possibly failing.
Yes, let us know what happens with a new axle.
Charlie-III is online now   Reply With Quote
Old 03-12-2018, 05:07 PM   #9
BugeyeZo
Scooby Newbie
 
Member#: 462089
Join Date: Jan 2017
Default

Installed new axle today and all my problems are gone !!
BugeyeZo is offline   Reply With Quote
Old 03-13-2018, 10:44 AM   #10
Charlie-III
NASIOC Supporter
 
Member#: 30669
Join Date: Dec 2002
Chapter/Region: Tri-State
Location: USA, North NJ, 07456
Vehicle:
1998 Legacy 2.5GT
Silver Sleeper BK, 5MT

Default

Quote:
Originally Posted by BugeyeZo View Post
Installed new axle today and all my problems are gone !!
Glad you got it fixed.
Thanks for posting a resolution, I hate dead end threads.
Charlie-III is online now   Reply With Quote
Old 03-13-2018, 06:08 PM   #11
BugeyeZo
Scooby Newbie
 
Member#: 462089
Join Date: Jan 2017
Default

Seriously
I've read way to many to no avail
BugeyeZo 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 07:40 AM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2024 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.

When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission
Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.