This question is for those that have a Ford V10 in a class A. I have a 2007 Allergo 32BA with the Ford V10 that only has 36,000 miles on it & I took it to mountains of Western NC this week, and it see...
You might look into a 5 Star Tuner for the V10. We've had one in our 32' Class C that we tow with. Made a huge difference in climbing and cruising. We tow a Chevy tracker with ours which probably is similar in weight. We have better shifting, climbing and even 1 MPG better mileage.