I have seen all 5ers being pulled by any kind of trucks. The new higher and deeper boxes on the trucks surely causes problems for most 5th wheel hook ups. With my 98 RV I had to remove the lifts on the rear of my truck to keep a level setup. With the new 2009 I installed the lifts again and I am riding level again so the newer trailers do have higher pin height. At leased the heavier units.
I would not like to set up a 5th wheel on the rear of a F150 or F350 4 x 4 SRW, or Ram 3500 4x4 SRW and all GM SD 4 x 4.
But I guess letting the rear drop is the solution, because the reason to be so high is so they can drop down more with a heavy load.
The designers of thosemodels never used the truck on the 5th wheels for sure. I noticed that in 1997 when the new Ford SD come of the assembly lines.
Barbara and Laurent, Hartland Big Country 3500RL. 39 ft long and 15500 GVW.
2005 Ford F250 SD, XL F250 4x4, Long Box, 6.0L Diesel, 6 Speed Stick, Hypertech Max Energy for Fuel mileage of 21 MPusG empty, 12.6 MPusG pulling the BC. ScangaugeII for display..