Bad front end whine - JeepForum.com
Reply
 
LinkBack Thread Tools
post #1 of 20 Old 08-04-2013, 11:08 AM Thread Starter
Adam86
Registered User
1998 ZJ 
 
Join Date: Dec 2012
Location: Birmingham
Posts: 62
Bad front end whine

Getting quite bad now. Front end is whining quite loudly but only when on the throttle. Pretty much silent when off the throttle.

Where should l start?

4.0 & 249 but l think its the front axle. LSD in the rear.

Adam86 is offline  
Sponsored Links
Advertisement
 
post #2 of 20 Old 08-04-2013, 11:11 AM
DickDickle
Registered User
1996 ZJ 
 
Join Date: Feb 2012
Location: Dracut
Posts: 545
How is your front drive shaft? Check all the joints for play, you could even take it out and go for a ride and if the noise is still there obviously not the problem, there are only 8 8mm bolts that hold it in.
DickDickle is offline  
post #3 of 20 Old 08-04-2013, 11:14 AM
zj97ltd
Registered User
1993 ZJ 
 
Join Date: Apr 2013
Location: Cape Coral
Posts: 1,078
If it's only when applying power it might be in the diff. I'd wiggle the pinion (input) shaft and see if there's any slop. Usually this is accompanied by a leak because the loose pinion shaft messes up the seal. If it's the carrier bearings you'll have to pull the cover to investigate. Hub bearings are a common failure too but from my experience, they'll make noise at speed regardless of whether you're giving it power or not.
zj97ltd is offline  
post #4 of 20 Old 08-04-2013, 11:19 AM Thread Starter
Adam86
Registered User
1998 ZJ 
 
Join Date: Dec 2012
Location: Birmingham
Posts: 62
I was going to try removing the shaft but then it only does it when im on the throttle. So can't see it making a noise without the shaft anyway.

Just being out to check the shaft and its got no play. Feels solid.
Adam86 is offline  
post #5 of 20 Old 08-04-2013, 11:21 AM Thread Starter
Adam86
Registered User
1998 ZJ 
 
Join Date: Dec 2012
Location: Birmingham
Posts: 62
From what's being posted im thinking carrier bearings.

When l pull the cover where and what am I looking for?
cheers.
Adam86 is offline  
post #6 of 20 Old 08-04-2013, 11:29 AM
zj97ltd
Registered User
1993 ZJ 
 
Join Date: Apr 2013
Location: Cape Coral
Posts: 1,078
Grab the ring gear and see if you can wiggle it side to side.
zj97ltd is offline  
post #7 of 20 Old 08-04-2013, 11:33 AM Thread Starter
Adam86
Registered User
1998 ZJ 
 
Join Date: Dec 2012
Location: Birmingham
Posts: 62
What's the ring gear?

Can you tell I've never had an axle apart lol

Thanks for your help.
Adam86 is offline  
post #8 of 20 Old 08-04-2013, 11:39 AM
zj97ltd
Registered User
1993 ZJ 
 
Join Date: Apr 2013
Location: Cape Coral
Posts: 1,078
Sorry lol. It'll be obvious when you pull the cover off. You'll see the teeth running perpendicular to the ground. Grab hold of it and try wiggling left to right. You may have to do it with the front wheels off the ground and in neutral so that the rest of the drive line isn't bound up keeping it tighter than it may really be. Here's a pic of mine, you can see the large teeth sticking out, that is the ring gear. Inside the cover, you see to the far left and far right the bolt heads? Those are holding in the carrier bearings on each side.
Attached Images
 
zj97ltd is offline  
post #9 of 20 Old 08-04-2013, 11:52 AM
DickDickle
Registered User
1996 ZJ 
 
Join Date: Feb 2012
Location: Dracut
Posts: 545
Quote:
Originally Posted by Adam86 View Post
I was going to try removing the shaft but then it only does it when im on the throttle. So can't see it making a noise without the shaft anyway.

Just being out to check the shaft and its got no play. Feels solid.
Not true I had a bad front shaft that would make noise on acceleration sounded like a train or a bad up hill climbing roller coaster and would be quiet on deceleration. If you don't find anything in the diff try removing the shaft its not going to waste any time giving it a shot
DickDickle is offline  
post #10 of 20 Old 08-04-2013, 12:10 PM Thread Starter
Adam86
Registered User
1998 ZJ 
 
Join Date: Dec 2012
Location: Birmingham
Posts: 62
Thanks for the above information guys.

Just being round the block to take a quick vid. You can hear the whine stop when off the power. This was between 15-30 mph.

I assume you guys make make out the whine?


Adam86 is offline  
post #11 of 20 Old 08-05-2013, 02:17 AM
shaban
Registered User
1996 ZJ 
 
Join Date: May 2012
Location: Yarraville
Posts: 571
Try tightening up the pinion first - it helped my whine, was getting noticable at 50+ mph. Read up on setting the pinion preload for the front axle.
shaban is offline  
post #12 of 20 Old 08-05-2013, 07:51 AM
Snowfan2
Registered User
1998 ZJ 
 
Join Date: Jan 2012
Location: North of Amarillo
Posts: 665
Quote:
Originally Posted by shaban View Post
try tightening up the pinion first - it helped my whine, was getting noticable at 50+ mph. Read up on setting the pinion preload for the front axle.
+1
Snowfan2 is offline  
post #13 of 20 Old 08-05-2013, 08:51 PM
shaban
Registered User
1996 ZJ 
 
Join Date: May 2012
Location: Yarraville
Posts: 571
And yes, before doing anything else, change the oil. If you have visible damage on the gears or chunks of metal in oil, chances are its too late.
shaban is offline  
post #14 of 20 Old 08-21-2013, 12:13 PM Thread Starter
Adam86
Registered User
1998 ZJ 
 
Join Date: Dec 2012
Location: Birmingham
Posts: 62
Had chance to take a look. Prop is fine and l had no metal in the diff oil. Everything seemed tight enough.

Are these the carrier bearings?

http://www.ebay.co.uk/itm/Dana-30-35...item27c9304923

Cheers
Adam86 is offline  
post #15 of 20 Old 08-21-2013, 12:15 PM
DickDickle
Registered User
1996 ZJ 
 
Join Date: Feb 2012
Location: Dracut
Posts: 545
Did you try driving with the front shaft out yet?
DickDickle is offline  
Reply

Quick Reply
Message:
Options

Register Now



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

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

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



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 Off
Pingbacks are On
Refbacks are On

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