Jeep TJ - weird thumping sound on take-off

[offroadn]

Transfer case shifter linkage problem is what I discovered.

http://offroadn.wordpress.com/2011/12/12/jeep-transfer-case-shifter-linkage-fix-tsb/

 

[upnover]

Might also want to check the tranny mount and engine mounts.

 

[offroadn]

I did. This actually fixed the problem.