Not trying to be pushy but just for piece of mind, when I first got my trailer (18'), I had a '00 Chevy x-cab. The added 2' was definately not a hindrance. I could pull it just fine comparing to a similarly loaded 16' trailer. Main thing is, espeacially with the 700-r4/4L60 trannies, when towing, never let it get into overdrive. Lock it in drive and if you're pulling a steep grade and it doesn't want to go to drive even, lock it in 2nd. Don't let the tranny jump, it will die. When you get the new trailer, don't cut corners and get a cheapie controller. Drop the additional coin and get a Prodigy right off the bat. My Dodge came with a Voyager (also made by Tekonsha but lesser model than the Prodigy) and I am constantly having to adjust it depending on the load. Prodigy does it by itself and gives a pretty smooth ride.