Hill Descent Upshift Feature
sd+ dm ch14; m2+ dm ch14; p4 dm ch17; 57x dm ch15; 47x/48x/49x
dm ch16; CasGen5 dm ch15
Note: It is critical that the driver maintains complete control over the vehicle at all times.
The proper speed, and gear if in manual mode, should be selected before the crest of any hill to ensure a safe descent. The driver should apply engine and service brakes appropriately during any descent.
If the feature is enabled, the Detroit™ automated transmission (DT12) is capable of upshifting automatically when descending grades. When the vehicle is descending without engine or service brake application, the DT12 will upshift at 2000 rpm. If the engine or service brake is applied during descent, the DT12 will upshift at 2400 rpm.
Note: