I know this is more a show, rather than tell thread... BUT I had to report back after driving the new to me motorhome back home... a good 4hr trip. Man! I am impressed! I did not think it would be THAT much better, but it is. I was expecting some improvement going from a fleetwood discovery CAT C7 (freightliner chassis) to the American coach revolution (spartan chassis, TAG 450 cummins ISL) .... but it was a significant difference! Smoother ride suspension wise, and stability wise. Also the motor is so much quieter... almost deceiving when accelerating (slower out of the gate seems to be the only downside) .... but when I press the peddle, I can't even hear the motor RPM up... it just starts accelerating. I guess the CAT motor had a little more hot rod noise to it.
Now I wasn't towing anything (that test will be next week) but on the way home... there is the smaller grade going up through whitewater.... I just had the cruise set at 70 and hummed up the whole thing holding 70... without hunting for gears, downshifting etc. also, the engine brake works so much better than an exhaust brake, and I was only in the low setting.
started with a 2004 V10 gasser about 10 years ago... was a great rig and treated us great... but man, driving it was a nightmare... all over the road, especially while towing in any sort of wind! it was a white knuckle express ride, feeling like we were gonna die at any moment lol... went to the discovery about 5 years ago and such a huge improvement in drivability could actually go 65MPH in heavy winds with not much driver effort... only thing that sucked is when I went with a stacker... it was a major dog up any grades... felt like a boat anchor back there. Looking forward to the new experience.