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Old 06-02-2011, 12:08 PM   #1
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Rear axle shake/noise when turning at low speed/under acceleration.

So, basically since my lift and 33s, often times (it went away for a while) when I go around a turn, like say turning right or left out of a driveway, or at a stop sign or light, and accerate, my rear axle makes a noise kinda of like a quiet repeated thump, and feels almost as if its bouncing or grabbing. I took my track bar off and added a washer in, because there was some space in the bracket, and this helped alot with my steering/stability of the jeep and felt alot more stable around turns. but lately there have been some issues with it again doing this. So im just wondering if it is because of the tires being too large, and im accerating too much (im not accerating that hard, i putz around) or if its a bad U joint, or some other issue. I also had an issue with my right rear shock mount, the one bolt snapped off, and was drilled out. thread got messed up by the guy I let drill (a friend) so, I was a lil POed, but ended up using a selt taping bolt to secure it in place on one side, and the regular bolt with no issues on the other. After about 2 months and several offroad trips, I jacked up my jeep and took a look. It still looked fine, I shook it and hit the shick gentle with a rubber hammer, and the bolt was still TIGHT. so I dont think I am having any issues there. it must be some other place but everything I have checked has been in order and fine. The jeep still drives fine and all, so Im not too worried but I want to get everything as perfect as possible. Thanks for any help or suggestions.

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Old 06-02-2011, 12:23 PM   #2
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Have you changed the rear diff fluid(with the proper additive?)

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Old 06-02-2011, 01:04 PM   #3
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Limited slip differentials will sound and feel like you describe, to a point. The axles are under pressure via clutches to spin at the same speed. When you go into a turn the outside tire is forced to spin faster and causes the clutches to slip. This is by design. The clutches give before the axles.

Limited slip diffs take special diff fluid to keep those clutches healthy. Like the above post implies, if you use the wrong fluid this behavior gets worse.

I'm pretty sure Detroit Lockers don't use clutches, but act similar to limited slip diffs in turns. I do not know if they need special fluid or not.
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Old 06-02-2011, 01:05 PM   #4
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nope, and its just a reg D44. there was no issue before hand so I dont think its the fluid.
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Old 06-02-2011, 01:06 PM   #5
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Im pretty sure I dont have an LSD , def not detroit. unless I have a rubi take off D44 on my jeep with the stock lsd or whatever locker comes in there, then I could. but not to my knowledge.
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Old 06-02-2011, 01:09 PM   #6
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also when going from reverse to drive, I get a small clunk but I assume this is just the Tcase when the gears n such are changing and seating.
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Old 06-02-2011, 06:37 PM   #7
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Broken spider gears in the rear will cause all kinds of noise when turning.
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Old 06-02-2011, 07:17 PM   #8
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it sounds almost as if its grabbing or something strange like that, almost as if its not functioning as an open diff correctly. I dont get it.
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Old 06-03-2011, 02:12 PM   #9
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Quote:
Originally Posted by GoldenSahara00 View Post
also when going from reverse to drive, I get a small clunk but I assume this is just the Tcase when the gears n such are changing and seating.
So you have an auto. So do I.
When I go from rev to drv I don't hear any clunking. At least nothing I've noticed before. Broken spider gears could though....
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Old 06-03-2011, 07:08 PM   #10
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The best advice I can offer isn't much but after your PM, I can only suggest you remove the axle's differential cover and have a good look around inside. In particular, with the axle jacked up and the t-case in Neutral so an assistant can rotate the tires for you, just carefully examine the differential. In particular, look at the ring & pinion gears for any damage/chunks missing, and then closely examine the four spider gears inside the differential for damage.

If you don't see anything wrong inside there, perhaps you've got a bad outside axle bearing which is neither expensive nor difficult to replace.
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Old 06-04-2011, 10:06 AM   #11
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Thanks Jerry. I'm gona see what I can figure out today.
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Old 06-09-2011, 01:58 PM   #12
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Bump. Think maybe I could need to straighten out my axle in the control arms. since the bolts fit in slots not a straight hole, it could have gotten loose or out of alignment in those holes? I feel the noise is coming from the left rear control arm or hub area. it was making a good bit of noise today, and i went offroading. doesnt seem to be hurting anything just noisey. i know it could be causing wear though. I freed up saturday to work on this, so any tips or places to look would be appreciated.
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Old 06-10-2011, 10:08 AM   #13
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bump... im under the jeep, track bar looks good and is tight, CA's are not damaged and seem tight. I am going to double check everything. I need to get my jeep jacked up but my jack doesnt get it quite high enough, so I am waiting for someone to get home to help me so I dont kill myself. I now have the sound even when accelerating and going straight not just turning. but only from a dead stop when i am heavy on gas. it is distintly on the right rear side. I thought it could be slack in the driveline but that would be more from the middle... never the less I am going to check it once I get it up. anything else I can check for short of opening the diff? I dont feel that it is the gears or anything in the diff. it is not that kinda of sound, no grinding or such, and it runs perfectly. just the sound. I can video it if need be. Also could a lose shock bolt on top cause this sound? I dont think so but It could be popping back and forth under the force of acceleration. the thing Is I wheel it hard and the bolt is still in, and it doesnt make noise going over rough ground or anything so that doesnt make sense. I could really use some help here. thanks.
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Old 02-23-2012, 05:43 PM   #14
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I tightened the rear shock bolt I had screwed up and added during the lift. Since my body lift I could get to the nut on top and that fixed most of my shock noise. Replaced the bushing on my trackbar a while back and that fixed the problem. It also seems that the bar wants to twist in the bracket and not sit flat with the sugars. I had to actually tighten the bolt enough to Bend the 3/16 steel of the bracket into the bushing area. But after I did it. Drive a day and retorqued it stayed tight.

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