I have owned 4 tag axle coaches and I did own a 2004 Foretravel 38' with tag. My best friend has a Foretravel 38' without tag. His is a beautiful coach but did not ride as well as mine and Foretravel puts a 500 ISM engine ontheir 38tags. His has a ISL 400. Their weights were pretty close but mine had far better hill climbing capability and ran smoother. Mine could tow 15000 lbs. So those of you who haven't owned a tag you really can't comprehend the huge difference to those without a tag. This is just my opinion
I would agree with John I have owned four Foretravels and would not own a coach without a retarder. Yes it is a Allison on they build a huge cooling system to cover all the heat reduction necessary. After over 75000 miles with retarder you will not be disappointed.