i want to run my car on the dyno we only have a 2wd dyno jet there is any problems ? i already have a 2wd mod on my car thanks guys

sure can......http://www.youtube.com/watch?v=lAjvirsU5SU&mode=related&search=

how do we get the rig to only spin 2 wheels?

Pull ABS fuse, Pull Ediff fuse, Unplug the transfer case.

The person opperating your jeep during the Dyno needs to get out of first quick otherwise it goes into limp mode. So you need to punch it in first, then get out of first. ;)