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Ok, so I am going to mount a 10K M35A2 2.5ton (deuce) pto winch on my truck (79 ford f250). Anyway, I am planning on mounting the winch between the frame rails directly behind the cab. I am going to box the frame in, and then use some 3"x6" box tube to mount to the frame on each side then the winch in the middle. Sorry if this is confusing. So, I can get some 3/16" thick tube fairly easily, I wanted to go with 1/4" but can't find any easily (without ordering). Do you guys think the 3/16" thick tube will be strong enough? Or should I get some 1/4"?? Remember the frame is only about 3/16" also, I am boxing it in with some other frame pieces from a truck I scrapped out. Lastly, the mouting of the winch will span the 6" lenght of the 3"x6" tube, so I am not worried about crushing the tube in , or should I be? Thanks in advance!!!
I have a similar set up on my truck in rear just over my axle. 1/4" is what I would use. Also when you build up your also need to make sure you do some plating down the side of frame the top of frame will bend or flex. So when you build just add some extra on sides for support. One other thing is once you do this you will notice a change in balance in truck. When I installed over axle it helped my rear pull better with the weight over rear. Really nice on ice and snow.
I plan on boxing the frame in using other frame pieces, then I will place angle iron on the top of the frame, because I want to place the winch slightly above the center line of the frame so that I will have d/s clearance, and also the line pull will be more centered. Do you have any pics of your setup? I would love to see it!!!