I don't think that any truck will be 90 degrees from the trailer because of the way the trailer hitch is built. I would be more afraid of doing more damage to other things if I turned that sharp. I can understand what you are saying though.
2011 jayco 33rlds, 2002 Ford excursion, v-10, 3:73 gears 4x4 mine. 2008 Suzuki sx-4, hers. Retired Air Force, now Retired.