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'00 XJ rear end thunk

Old 10-24-2011, 08:51 PM
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Default '00 XJ rear end thunk

This is driving me nuts so I'm looking for help here. When I'm driving and come to a stop I get a thunk sound from the back end. It also does it when I start moving. I can't tell if it's coming from the driveshaft or axle. Any ideas?
Old 10-24-2011, 09:30 PM
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Does it feel like the rearend is wrapping up? Mine was doing that and it was the slip yoke on the drive shaft going into the transfer case, take your drive shaft off and put some grease on the splines or you can use anti-seize on it to. There isn't any lube going to the splines so once a year I lube it myself. Hope this helps.
Old 10-25-2011, 06:59 AM
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Sounds like a u-joint to me.
Old 10-25-2011, 05:58 PM
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I'll check this out more this weekend. Also, the leaf springs so bad they are starting to bow up. I don't know if that could cause the thunking. I'll let you guys know what I find. Thanks.
Old 10-25-2011, 06:13 PM
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I am also hearing a clunk from my rear end I grabbed the hatch and shook it when it was closed and it seems to be coming from the hatch itself.
Old 10-25-2011, 08:16 PM
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Originally Posted by wahoo
Mine was doing that and it was the slip yoke on the drive shaft going into the transfer case, take your drive shaft off and put some grease on the splines or you can use anti-seize on it to. There isn't any lube going to the splines so once a year I lube it myself. Hope this helps.
this is how i fixed my rear end "thunk"
Old 10-25-2011, 08:29 PM
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Ive got the same thing going on just suspected the brakes. Glad someone posted this!
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