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-   -   98 ZJ Back diff grinding while turning (http://www.jeepforum.com/forum/f13/98-zj-back-diff-grinding-while-turning-1519669/)

shaynesaw 05-06-2013 05:55 PM

98 ZJ Back diff grinding while turning
 
When I turn either direction I hear a low pitch grinding sound coming from the back axel area.
It gets worse the sharper I turn. Seems to be a lot worse when accelerating while turning.
I haven't looked to far into it because I just noticed it but any thoughts? possibly no fluid?



Can anyone help in this matter?

durango-bob 05-06-2013 06:37 PM

Bad wheel bearings would do that. And they go bad in short order when you run low on Diff fluid.

shaynesaw 05-06-2013 09:39 PM

Quote:

Originally Posted by durango-bob
Bad wheel bearings would do that. And they go bad in short order when you run low on Diff fluid.

Thankyou kindly

shaynesaw 06-09-2013 10:40 AM

Quote:

Originally Posted by durango-bob
Bad wheel bearings would do that. And they go bad in short order when you run low on Diff fluid.

So I changed the back wheel bearings and inspected the diff condition. Diff looks mint.
I'm still getting a grinding at the rear end when I turn either way. It doesn't seem to do it until I've driven it for a bit and everything in warm.
Any thoughts?

shaynesaw 06-09-2013 12:23 PM

Part store guy suggested synthetic gear oil and posi-track antislip additive.
Will try that

lil_joe 06-09-2013 02:06 PM

If you Have the tow pkg, it could be your LSD

shaynesaw 06-09-2013 02:14 PM

I did have the tow package but removed it.

Is the dana 44 a LSD?

Timo_90xj 06-09-2013 02:19 PM

Not necessarily. However, since your bearings are good I would also suspect the limited slip clutch packs. They tend to go bad within 100-150k miles, sometimes even less if wrong type of gear oil was used. If they are bad, you need to replace the packs to make the grinding go away. Use spicer replacement parts.

I'd strongly suggest using the Mopar limited slip friction modifier whenever changing gear fluid in the rear. That is, if you have a limited slip rear.

shaynesaw 06-09-2013 02:31 PM

1 Attachment(s)
Can you tell if its LSD by this picture?

PolkaPower 06-09-2013 02:58 PM

That is a limited slip carrier.

shaynesaw 06-09-2013 02:59 PM

I appreciate the help

dusterdude 06-09-2013 06:40 PM

Quote:

Originally Posted by PolkaPower
That is a limited slip carrier.

Polka,im used to seein clutch packs in the lsd carriers,how can one tell that one is lsd

PolkaPower 06-09-2013 07:07 PM

1 Attachment(s)
Quote:

Originally Posted by dusterdude (Post 15540215)
Polka,im used to seein clutch packs in the lsd carriers,how can one tell that one is lsd

The shape of the carrier. Here is a open and LSD.

HOSTED67 06-09-2013 07:31 PM

Changing the fluid and adding friction modifier is a cheap and easy thing to try first. Drive it for a while and see how it does. The noise could go away after the new fluid and friction modifier work into the clutches.

shaynesaw 06-09-2013 07:46 PM

Thanks for the picture comparison.

I will change it tomorrow and see what happens


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