Loud growling noise from rear; both bearings already replaced... Bad rear diff/RDA? - Jeep Compass Forum
LinkBack Thread Tools Search this Thread
post #1 of 5 Old 01-20-2019, 01:27 PM Thread Starter
Junior Member
Join Date: Jul 2018
Posts: 4
Exclamation Loud growling noise from rear; both bearings already replaced... Bad rear diff/RDA?

I have this wicked loud growling noise that increases volume with speed. I have replaced both rear wheel hub bearing assemblies (did the rear right yesterday) and still have the noise. I drained the front and rear differential fluid and replaced it with fresh 80W-90. The front fluid came out almost new and the rear fluid was black.

Is it either a bad rear carrier/differential (RDA) or bad CV shaft or a bad center shaft bearing?

RARELY the noise will stop IMMEDIATELY for a few seconds then come back. Like an on/off switch for the extremely loud grinding sound. Before I drop $200-300 on a used rear diff I would like to know if anyone has some experience with this.
Trailblazer is offline  
Sponsored Links
post #2 of 5 Old 02-19-2019, 02:01 AM Thread Starter
Junior Member
Join Date: Jul 2018
Posts: 4

I spent the $200 for a used low-mileage rear differential ("carrier assembly"). What a pain in the ass to install. I had to drop the exhaust, drop the rear sway bar. Lower it down and yank the CV half shafts from it. Re-install. I almost went blind when I was cutting the exhaust clamp with my cordless grinder; a piece of debris bounced and made it past my fast shield. What a real pain in the butt job. Took me like seven hours. I need to get a new band style exhaust clamp as I had to cut the OEM one off as the bolt was super rusted.

Here is the best part. EVERYTHING I DID WAS A WASTE OF TIME AND MONEY. I replaced the right-rear hub bearing last month thinking it was causing the noise. Nope wasn't that. TURNS OUT IT WAS THE OTHER SIDE. Yup. I replaced that bearing with a Moog in July 2018 (3yr warranty). That miserable piece of crap wasted so much of my time and money.

Yes I did the "wobble test" on all wheels twice to see if there was any play and there never was. Until today.

After I finished the job I still had it on four jacks so I put it in drive with the new rear diff. It sounded like hell still. So I shutoff the engine and go to the rear and manually spin the tires. Yup - I could actually feel how bad the left-rear bearing was. Wobbles like crazy too. I wish I would have did the "wobble test" to check for play earlier this morning before I started ripping everything apart. What a mess. I just initiated a return for RockAuto for the two new CV half shafts and am trying to negotiate a return of the rear differential to the seller. Might not be worth it considering the high cost of shipping...

2012 Compass Sport 4x4
Trailblazer is offline  
post #3 of 5 Old 02-19-2019, 04:41 AM
Senior Member
Join Date: Oct 2017
Posts: 750
Aye, thats the frustrating way it goes sometimes At least you got to the bottom of it eventually.
arudlang is online now  
Sponsored Links
post #4 of 5 Old 09-27-2019, 08:54 PM
Junior Member
LexieCompass's Avatar
Join Date: Aug 2017
Posts: 11
My wife's 2007 Compass needs a new halfshaft - I'll have to do all that just to replace it.
LexieCompass is offline  
post #5 of 5 Old 10-01-2019, 01:24 PM
Join Date: Jun 2019
Posts: 39
I have this since new and have heard others as well.
Pretty sure it just the sound of the transfer case and nothing wrong (not yet anyway).
CanadaEastKTM is offline  

Quick Reply

Register Now

In order to be able to post messages on the Jeep Compass Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Posting Rules  
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome