96 grand cherokee rear end squeal???

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Sep 3, 2012 | 05:27 PM
  #1  
from what I have read here, i believe i have a d35 c-clip rear end. the cover is lipless...flat, with a rubber plug. it has ABS. it leaked on one side so i changed the bearings/seals. I also changed the u-joints. It appears to be spraying 80/90 on the chassis from the pinion bearing seal.

the bearings were not a tight fit in the tubes...scary. the seals fought me tooth and nail...barely went in...scary. my brakes were toast so I changed them, e-brake shoes and all. still squeals awful...but not all of the time!

If I make a hard left turn, everything gets shifted sideways and it sounds like a spun rod bearing. I make a hard right turn, everything shifts to the other side and the squeal stops. the shift (lateral movement) is only .060-.090
the slop is from 251,373 miles of wear. i plan to swap out the rear end but i'd really like to know why it squeals like a burning pig.
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Sep 3, 2012 | 05:58 PM
  #2  
btw, which digit of the vin denotes rear end application on a 96 zj?
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Sep 3, 2012 | 07:18 PM
  #3  
no one even gonna speculate regarding the banshee like noise that occurs during sideload? pinion bearing? bearing spinning in tube? worn thrust washers? opossum stuck in coil spring?
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Sep 5, 2012 | 05:04 PM
  #4  
today, i invoked the screeching demon by turning left and...kinda sounded like it may be the driver's side hub in the front. the hubs were very worn 90,000 miles ago. i have been waiting for a sign.

gonna change the fluid in the rear end and look for damage there first. still flushing metal powder. in may, i changed the wheel bearings and very thoroughly flushed the casing/tubes. 4th of july, i changed the fluid. very metallic. hard to get the debris out of the inner bearings. it's due for another change anyway. usually after a bearing swap, i do this until i get nearly clean oil then drain and fill with lucas. may add a bottle of z-max to this one.
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Mar 19, 2013 | 01:18 PM
  #5  
found the problem...when i removed the old wheel bearings with a slide hammer, two of the bearings were left in the tube . I couldn't see them because they landed in a small slot next to the inner bearing. I removed the ring gear assy and they fell out. I am humbled. To say I am meticulous is an understatement. I can't believe I didn't count the number of bearings in a race and count to make sure I retrieved them all. Thank God nothing was damaged. The squeal was stripes being made on one of the axle shafts. The contact was not prolonged and didn't cut into the axle or I would have replaced it. The bearings took the brunt of the abuse.
The rear-end is now free of metal shavings (and extra pieces) and full of synthetic Lucas gear oil.
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