I have a 2104 allegro RED with the 6.7 340 hp and 2500 transmission. I towed a Toyota 4 runner which was around 4500 lbs and my coach is 29500 lbs. I traveled out west and north up into Canada. The coach did fine as far as transmission temperature, engine temperature and overall performance. Long grades slowed me down but I was always keeping up with the flow. At times some people passed me, however there were times that I passed others. I always use the shift arrows and down shift long before the transmission automatically down shifts. When I am in mountains or very hilly roads I limit the transmission to 5th gear and at times have limited it to 4th gear to reduce the slow down on long grades. I had the transmission serviced at 30,000 miles and the tech said that the fluid looked new and there were no indications of abnormal wear. With all of that said I don't have a problem driving it this way and am ok with the performance. However knowing what I know now I probably would have purchased something with at least 360hp and 3000 transmission. This is my first class A coach and I wasn't aware of the options. But it's not worth the money to trade up now because of the slight inconvenience of having to help it shift.