Bruce, does your Marathon have an actual Transmission Retarder or a Jake Brake?

The way you were mentioning you could use stage 1 or stage 2 it sounded like you were talking about what I have which is a Jake Brake.

I am not real happy about how my Jake is functioning either, so I was hoping it would be just a computer hook up to adjust it, BUT PROBABLY NOT that simple for me?

MY BUS IS STILL IN PREVOST, but they tell me maybe I can get her in a week or more?

Gary S.