I did a 338whp Dyno pull in 2wd mode. Just be sure to put the bolt in the lever while in 2wd mode, It has been said someone didn't and it slipped back to 4wd on the dyno!
Here is a link to a picture of the lever.
http://alltrac.net/phpBB2/viewtopic.php ... +positions
Here is a link to a picture of the lever.
http://alltrac.net/phpBB2/viewtopic.php ... +positions