The '04 6 speed (NV5600?) has square covers that bolt on both the right and left side of the case. I assume these are mounting points for a PTO. Do any of you know if this is correct? If it is, are they available through Dodge or the original manufacturer? As a by the way, who does make this gearbox?

 

Its built by NEW VENTURE.I've seen tow trucks and of course they have the pto operational.

 

The PTO mount covers are six bolt, vertically oriented rectangles, almost square. Sounds like what you are looking at. The bottom bolt holes are also used as a drain if you want to change your fluid. If you take off the covers there is a small square flat magnet on the bottom of the transmission that can be removed for cleaning.

As Hounddog indicated it is a New Venture model NV-5600. Any 6 bolt style PTO accessory should work just fine.