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Discussion Starter #1
I took my 97 Sport in for a squealing I thought might be ujoints or a wheel bearing. They threw it on the lift and the mechanic tells me I have more wrong than that. He said there is an issue in the front diff as well.
When he spun the tire, the drive shaft rotated and there is a thunka thunka sound as it rotates. I can’t hear or feel anything when driving but he said it could go at any time. I just parked it for now but got to thinking. I have a Power Trax lock right locker in front. Might that be causing the noise when it’s off the ground? I didn’t think to tell him I had it so hoping that’s it before I drop money into it.

TIA


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IMO best thing you can do is open the cover to inspect the front diff. A lunchbox locker shouldn't make any noise unless you are turning, then it would be a slight clicking noise.
 

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Discussion Starter #3
Thanks. The clicking i’m aware of of course. I can’t get underneath anymore to check stuff. Knee and back issues. I may just take it elsewhere for a second opinion. Wouldn’t you think I’d hear that noise or feel something amiss when driving though?


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Discussion Starter #4
Differential is fine fortunately, just needed a fluid change. It’s the locker on its way out. Still drives fine and she’s still functioning so we sealed her up and back on the road again.


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Squealing is commonly caused by one of the two u-joints in the CV at the tcase-end of the front driveshaft. It's commonly called "angry sparrows". I'd check that out asap since if that CV joint goes it can seize/bind which will take the entire tcase out with it in a dramatic fashion. As in breaking the tcase in half. Literally.

For the time being I'd remove the front driveshaft and once out, check its CV joint.
 

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Discussion Starter #6
Thanks Jerry. The u-joints are fine wheel bearings all good. They’re still trying to track down the squeak/squeal though. Apparently it only shows up when the vehicle is in motion. I’ll pick it up tomorrow and see if they found it.


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I have posted about a high-pitched squeal I'm trying to track down. Good luck, hope you figure it out. I think mine is the rear pinion bearings but they haven't shown themselves yet.
 

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Discussion Starter #8
Somewhere someplace is some metal on metal squeaking. It can’t be found in the shop. All the critical stuff checks out okay. I guess it’s just a Jeep thing. lol


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My 8.8 squeal wound up being a carrier bearing race. I tore it all apart this weekend to inspect everything. The race did not look or feel bad at all. It did have an odd pattern on it. With a magnifying glass you could see tiny pits and the beginning of the radial choppy marks that happen when a bearing goes bad. It would seem the race was not fully seated and was sitting a little cocked. I replaced everything but axle bearings and now the squeal is gone.
 
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