I think the simpler solution would be a better ramp. If it has a smooth/slick surface, it's an accident waiting to happen. Both my ramps are made with an open grid of 1/2" fluted alum round stock cross-bars spaced approx every 4" horizontally. Regardless of mud and/or snow any of my ATV's (2 or 4x) go up it with zero problems or tire slippage.

 

I've had similar problems loading sport atvs into my trucks. I would suggest going with a longer set of ramps, made a world of difference for me. I believe mine are 10ft or 12ft and fold in half.

Another idea might be to simply attach an anchor point to the bed and use a come-a-long that clips to the front bumper of your Raptor. Little more tedious but cheap and simple option overall.

 

Right. Different ramps might be an easier, cheaper, and more effective option.

 

I used to run a small engine repair shop and did exactly this to be able to pull non running lawn and garden tractors up the ramps and into the bed of my truck. As someone else mentioned, the cable does run across the top of the tailgate until you get most of the way up the ramps. My truck at that time had one of the plastic, drop in bed liners with another piece of plastic screwed to the tailgate and even after years of use, the bedliner showed little to no wear from it. I used a Warn Rep 8000 winch and used the standard base plate that was made to fit the winch. I then drilled 4 holes through the bed directly above the frame rails. Then, I used 4 pieces of black iron pipe, I forget the diameter, but they went down through the holes drilled in the bed, and extended to about 1/2 inch above the bed itself. I then set the winch plate on top of the pipes. The outermost holes in the plate were wide enough to reach both frame rails. I got bolts long enough to go through the winch plate, into the pipes and then through the frame and installed lock washers and nuts under the top of the frame rail. After tightening everything up, I welded the pipes to the tops of the frame rails. This was done in the mid to late 90's on a 1985 F150 with an 8' bed. Used this setup for years without issue. Actually still have the truck with dreams on one day restoring it.

 

Maybe mount a roller on the lip of the tailgate that the cable would break over.

even a smooth plate would probably suffice