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Technical Support / Re: Fast Idle switch Engine Brake
« Last post by Nicholas Soldevere on February 21, 2026, 03:17:34 PM »I must comment on the auto-downshift when the engine brake is actuated. If you like that feature, then okay. But I did not like it and had our coach's transmission reprogrammed to remove the auto-downshift feature. The first day I drove the coach from Eugene, OR over the hill to Sisters, OR, that auto-downshift feature scared me to death! I thought the engine would go flying out the backend!
It wasn't long before I had it reprogrammed to NOT auto-downshift. This was done at the Kenworth truck shop in Pasco, WA.
Good advice and info, thankyou! I'll be getting out on the road with it in a couple weeks and will see this feature 1rst hand and decide if I like it our not. I'll run with your advice and get it programed out if I don't. Since the Eng brake has been "rigged" since I owned it and has been intermittent I have never really experienced the oem design features, so, I'm excited to get it out and run it.
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