I towed my Geo Storm on a dolly. THat's about 3K towed plus I had about 500 lbs of gear and parts in the truck. Total weight for everything was probably 8500 lbs or so. Lots of ups and downs and I didn't have too much trouble. With the 32's on she was definatly grunting on the steep hills and the brakes had to be pushed harder, but I didn't feel it was unsafe. If you do it, just be sure you slow down and gear down if you're going down long downgrades. Engine braking is your friend when towing! I even do it when not towing if the hill is steep and long enough.