Transmission or Rear Differential Clunk

[Ramona Wrangler]

2004 TJ Auto.....When I put rig in reverse or drive, I'm hearing a clunking noise. Doesn't seem to be u-joints, but could be. I crawled underneath to try and move the drive shaft and it feels solid...Just throwing this out there so I can pin point the problem, so I can fix it or pay the mechanic.

 

[DropTopDon]

Was going through the exact same issue a few days ago. Even if you don't think it is the u-joints, it probably is. My u-joint had zero play but when I opened it up all the needle bearings were crushed. If you really don't think it's the u-joints check transmission mount and control arms.

 

[tworley]

Remove a driveshaft and see if it goes away.