On my way out to Santa Fe, it was brought to my attention that I was riding my brakes and black smoke kept poping from my exhaust. Well, it was the Trans. retarder. I had left it on and any time I let my foot of the gas, it would slow the Coach down and then I would apply the gas. So, you have to be more aware of what you are doing. I was told you could raise the temp up to 290 degrees no problem. But I can not remember who at POG II told me. It is great for slowing down coming off the freeway, or having to make a rapid deceleration. I have to watch it on long down hill slopes.
My Country Coach Lexa has a 3 stage Jake and I liked that a lot also.

Finally, I really like my Liberty . Gary