7.3 bolt pattern, Diesel version of the 4r100 4 speed automatic. Transmission does not work. I believe it blew the pump i was driving down the highway in 4th. All of a sudden, i loose that gear and go down to 3rd. A couple seconds later i lost that one too. By the time i coasted off the highway i had no gears. Worked perfectly right up until that point. 250k miles on it. This is for someone looking to do their own rebuild possibly add some upgrades to it. $400 obo. Two81-623-704two. Craigslist email or chat works too. Text first if you want to call in usually dont answer random calls. Thanks.