My 22RE pulls my Jumpingjack tent trailer, with 2 quads on top. Sportsman 500 and Hawkeye 300, with the 4Runner loaded with camp gear. The 6 mile 6% grade uphill north of Phoenix was tuff. I just tucked behind the big rigs and put my flashers on too. No issues, no oil or temp fluctuations. 4500 RPM, 2nd gear to maintain 35MPH. Flat roads are fine, but fuel mileage was really bad. Other than that, all I really need is better upgraded brakes pulling that thing.

85 4Runner - With NEW Marlin 4.7 Gears!! It's a whole new beast!