Truck Shop
Senior Member
The best bet of advice for driving an AMT is it is to remember that you are not smarter than that computer and to allow it to do its thing. The sooner you learn that the easier your life will be
That's true--But there is several modes built into the system. Full auto, performance, and manual.
When descending a long grade such as Cabbage, the best way is to brake the truck down using jake
at the top in manual mode downshifting to 7th or 8th gear leave it there running the jake at 2000
rpm. It will hold all the way to the bottom {6 miles of 6% at 38 to 40 mph-45 in 8th at 100,000 gvw
without touching the brakes}. And that's with a Cummins or Detroit.
Left in full auto mode it can down shift at points the will cause a engine overspeed {in the neighborhood
of 26 to 2,700 rpm which will void warranty} Anything over 2,300 can cause a void.