I have a 2021 Laramie with ecodiesel and the 3.21 rear end. I’ve noticed since I bought the truck new in November that there’s a drone sound that is very audible right around 55-57 mph when in 8th gear. If the truck changes RPM or gear, it disappears. It sounds intake or exhaust related, (a resonant frequency) because it comes from the passenger side of the engine bay. It’s not a rattle, just a mid-toned hum.
I haven’t seen anyone else mention it. Truck has been problem free, and I just turned over 11,000 miles.
I haven’t seen anyone else mention it. Truck has been problem free, and I just turned over 11,000 miles.