I have towed both my 3000 lb boat and my 4,000 lb FJ40 Landcruiser behind my 2000 Tioga 22C on the E350 chassis equipped with the Triton 5.4L V8. It did very well for all of the weight and even climbed the Cajon pass at 45 mph but required me to run the engine at 3800 to 4000 rpm to do it. On level ground I could even sometimes use overdrive. Not the best engine for the job in a motorhome, but it always got the job done and is reliable. I disliked the lack of torque from the 5.4, so I traded up to a 6.0L Chevrolet chassis and love the engines torque, even in overdrive.
