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Clunk when let off the gas

6K views 6 replies 5 participants last post by  renguomin 
#1 ·
My 05 TJ clunks when let the gas in and out. Here is a video I found on youtube that is very similar to my problem:


I have checked 4 u-joints, all the bushings for suspension parts, exhaust pipe, they're all in good condition. I even bought a poly trans mount, it helped a little bit but could be a psychological thing. I thought it might be the increased backlash becasue of gears worn out in the rear diff until I regeared it last week and set backlash to 0.006'' but can still hear it. It sounds like "backlash" in the transmission gears as it clunks when let the gas in as well as out. Is it possible the worn out gears in transmission or transfer case make this sound?
 
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