Join Date: Jun 2003
Location: Wichita Falls, TX
Pretty much everything will be new.
You'll need motor mounts, tranny mount, etc. You can fab a transmission mount that uses the yj style rubber isolator and mates to your current skid plate very easily- it just requires some 1/4" flat bar. You can use the factory xj transmission shifter and cable, it actually mounts to the yj tranny pan very nicely. You'll have to fab up a t-case shifter.
You'll also want to clock the tcase up a little, the xj clocking hangs it down farther than you'd want in a YJ. This just requires drilling new holes, very easy as well.
There is lots of info on putting an aw4 into a YJ on the net. Any of those write ups address the linkage/mounting issues. The engine stuff will be the same as any swap. You'll need to burn in some motor mounts and address plumbing and wiring.
13 GC Overland - (Wife's DD) 5.7, stock
Past Jeeps: 99TJ, 78CJ7, 91YJ, 01WJ, 03TJ, 05KJ