Go Back   Jeep Garage - Jeep Forum > Jeep Platform Discussion > Grand Cherokee - WK > Troubleshooting/Problems

Join Jeep Garage Today
Reply
 
Thread Tools Display Modes
 
  #1  
Old 04-08-2013, 01:07 PM
MolsonBeaver's Avatar
Member
 
Join Date: Apr 2013
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 468
MolsonBeaver is on a distinguished road
Garage
Sound from Rearend

Hey Everyone,
I am new the the forum and am hoping you guys can help me diagnose an issue i am having with my 05 WK Limited. I bought the Jeep 9 months ago with 80k on it. I now have 103k. Within a month i had all bearings in the rear diff replaced due to one of them cracking. Since i have owned it i have heard a whirling/humming coming from the rear end. My mechanic tried to convince me it was my new tires.

Long story short i know its not the suspension and it cant be rear diff. Only other thing i can think of is the Rear wheel bearings. which i noticed a forum on here showing how to replace them. Does anyone have any other ideas? its raining currently or i would record and post a video of noise.
__________________

__________________
Reply With Quote
  #2  
Old 04-08-2013, 02:23 PM
Member
My Jeep: 2005 5.7L WK
 
Join Date: Jul 2010
Location: Kingston, Ontario
Posts: 788
Thanks: 0
Thanked 13 Times in 12 Posts
Rep Power: 276817
dr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond repute
Re: Sound from Rearend

Depending on how the rear diff was replaced, it certainly could make a humming noise...for example, if the bearing preload was not set correctly it would likely still whine at speed. Was it a complete rebuild, or did they just change some parts?

Does the humming vary with throttle on/off?

Does the noise alter when loading one bearing by turning?

If it varies with throttle application, it's most likely in the diff.

If it varies as you turn, then it is likely a wheel bearing.
__________________

__________________
Reply With Quote
  #3  
Old 04-08-2013, 02:51 PM
MolsonBeaver's Avatar
Member
 
Join Date: Apr 2013
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 468
MolsonBeaver is on a distinguished road
Garage
Re: Sound from Rearend

The rear diff was not a complete rebuild, however every bearing was replaced. as well as crush sleaves and oil/ lsd additive

The sound increases with speed but does not change when i let off the throttle.

I have noticed no change when turning and i have put it on jack stands and did the push/pull test and noticed no wobble. Tire tread has also not been affected.

Wheel bearing / hub aren't super expensive to replace should i just start there? at 103k miles they prob will need done eventually. Timken?
__________________
Reply With Quote
  #4  
Old 04-08-2013, 08:50 PM
Member
My Jeep: 2005 5.7L WK
 
Join Date: Jul 2010
Location: Kingston, Ontario
Posts: 788
Thanks: 0
Thanked 13 Times in 12 Posts
Rep Power: 276817
dr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond reputedr.lee.baugh has a reputation beyond repute
Re: Sound from Rearend

If you can do the labour yourself, yes, swapping out the rear bearings wouldn't be a bad idea (and, as you say, not all that expensive).

I replaced my front hubs with Timken about 40,000kms ago, and they seemed to hold up well so far.
__________________
Reply With Quote
  #5  
Old 04-08-2013, 10:00 PM
MolsonBeaver's Avatar
Member
 
Join Date: Apr 2013
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 468
MolsonBeaver is on a distinguished road
Garage
Re: Sound from Rearend

Yes i can do the labor myself. I guess i will order some wheel bearings and let you all know the results.
__________________
Reply With Quote
  #6  
Old 04-25-2013, 05:11 PM
MolsonBeaver's Avatar
Member
 
Join Date: Apr 2013
Posts: 7
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 468
MolsonBeaver is on a distinguished road
Garage
Well I replaced both rear hubs/wheel bearings today and the hum is still there. Running out of ideas. Sound starts at 30mph and gradually gets louder with speed. I may be repeating myself but letting off gas makes no difference. Sound is there as long as I am moving.
__________________

__________________
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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Rearend or rear suspension clunk/creak ClemS4 Trouble Shooting/Problems/Service 289 07-08-2014 08:34 PM
rearend issues & garage run around-grrrr hmmmm16417 Troubleshooting/Problems 4 08-05-2012 07:58 PM
Ticking heard in rearend cain45 Troubleshooting/Problems Discussion 15 05-16-2010 05:49 PM
rearend travel fix for the SRT8 lowering springs Scottina06 Trouble Shooting/Problems/Service 2 07-08-2009 06:29 PM

Powered by vBadvanced CMPS v3.2.3

All times are GMT -5. The time now is 10:01 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Copyright 2012 - JeepGarage.Org
The Jeep Grand Cherokee Owners Community