Original Fulton XLT on 09 Sabre trailer is failing to crank under load. Looks like bunch of teeth on gears are ground down . Anyone know load capacity I should get. Frequently must crank up last 6-8 “ on ramp; this is where winch fails, under a load. Otherwise it works when not loaded up. I know more is better. An enclosed one I looked at was rated up to 1600lbs, is that enough? Looks like the one that came on trailer is 1400# version.