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Actually, the winch assy on a M939 is hydraulically powered, so adding another winch into the system would be easy. Also, the auto trans is a nice option. I know, I'm talking myself into it, lol.

Actually Ron, I was seriously considering going hydraulic on the rear winch; thus the question about the M51A2 PTO. My parts truck is missing the pump, but that's not a big deal. I will be using air controls for the brake and freewheel clutch. Tha more I think about this plan, I wonder if I...

Yeah, I'd love to find an M815. On the other hand, I have the Tulsa 34 winch off an old Mack oilfield truck with mounting and headache rack, so all I need is to figure out the PTO. I have the dual output setup, which would work, but would prefer to find a T/C PTO.

Wow Ron, I forgot about the T/C PTO!! I have my duece winch truck rigged up that way, I don't know what I was thinking. Thanks for waking me up! I guess the T/C PTO was available on the M815 and the wreckers, correct? Anybody have a five ton T/C PTO for sale?

Thanks for the answers. My goal is to put a winch on the front of the M813, then remove the bed, and put a winch, fifth wheel, ramps and a rolling tailboard, thus making it a winch tractor.

Are the PTO's the same animal, or are they different between direct drive and overdrive trannys? I know there are two basic types: dual output(dump) and single output (front winch). The reason I ask is I have an M51A2 parts truck(dual output), and want to put the PTO in my M813, so I can run...