Map views of and then dashcam video footage from a recent trip down the long curvy 6% grade of I84 Oregon westbound (Cabbage Hill) on a busy truck traffic day in mid-April 2022. Our rig is a 2018 Ram 3500 ST Crew Cab Long Box 6.7L Cummins with AISIN tranny and SRW 3.42 Rear End towing a 10,000 lb Keystone Cougar Fifth Wheel Trailer.
Conditions were pretty fair with low wind and 50F+ temps, bare pavement. This stretch of road is notorious for poor weather and quickly changing conditions like snow, ice, fog, wind, and rain. Utilizing the Cummins turbo exhaust brake and tow/haul mode with higher transmission gears locked out made it a breeze. I barely had to apply regular braking the whole way down.