Allison 545 automatic 2wd transmission. Comes exactly as pictured, with torque converter. Was originally paired with a Cummins 12v in a 1996 freightliner box truck that was parted out. Will fit almost any Cummins 12v application, and maybe some others. It DOES have the auxiliary PTO I was going to use it for project but will probably never get to it. Trans works great- no issues. $450, which is a great deal with the converter and Auxiliary PTO option.Text Preferred please. Pickup in isanti, MN.