[Robert Dabkowski]

JD, the LU4 was the official Cdn. army winch for the M37 family of vehicles, we bought approx. 3500 trucks but only 700 came from the factory with this winch. I'm sure that the forces added more in later years (but not to ambulances) but they are still rareish north of the border. Easy to find in the US but much harder to find are undamaged split winch bumpers and frame extensions/brackets used to mount them. A.B.Linn in the US has most of the bits needed but will NOT ship out of the US due to a run in with US export controls a few years ago. Expect to pay about US$1100 to US$1200 plus heavy shipping for a complete set-up in good condition. Much better to buy a Cdn. parts truck with one and rebuild it because then you will have a Cdn. pto which IS different from the US one but looks similar. Be very careful on this subject as it IS possible to bolt a US pto to a Cdn. transmission BUT you will strip a lot of gear teeth the first time that you try to engage the winch.
Of course many other winch types do end up on M37s, including the MU-2 from the slightly earlier "weapons carrier" family of Dodges. Just requires some welding/cutting skills and a Cdn. pto instead of a straight bolt-on.
Very handy to have one on the heavy M152. Good luck, Robert