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paul1 02-15-2013 07:34 PM

thud sound when gas pedal pressed
2006 4.0 4spd auto. Sometimes after I let off the gas,coast, and then re gas it, there's a thud or conk that comes from the rear (I think). Is it my differential or pinion?

ob269 02-15-2013 07:49 PM

Probably your u-joint?

Another Guy In A Jeep 02-15-2013 07:51 PM

No a bad ujoint or dry one tends to screech or squeal. U could try putting grade in it tho to lube it

paul1 02-15-2013 08:04 PM

I was thinking that the pinion or dif could be worn down. I'll check my ujoints,it has 76000k btw

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