if you have 4wd, you can swap to manual but you can use the 3.0 manual tranny so that the Tcase will bolt up with no problems.
if you have 2wd, you can either swap to the 3.4 auto or the 3.4 manual tranny.
BTW, if any houston area ppl want to see the 3 swapped trucks, we're headed to the meet over at Tejas Toyota with Tundra Solutions on Dec 11th
http://www.tundrasolutions.com/forum...ad.php?t=32858