Found this at; Allison 2000 Series Automatic Transmission Cummins 5spd OD
This set up came out of a motorhome with a 5.9 cummins 24 valve and comes with SAE 3 Bellhousing, Torque Converter, Flexplate, Stub shaft, Cooler lines, Dip stick. No harness or shifter.
This transmission is for a 2wd but can easily be changed to 4wd
Please see the info below and the pic of the info plate, talk to an allison dealer and they should answer your tech questions for any other questions let me know.
It is older than 2006 I think 2000ish