After picking up our new camper with the factory 3.42 gear set I swapped in some 4.11 gears. With the 33’s and towing 65mph it hangs right around 2500rpm and holds speed pretty good on hills. Currently in Georgia but headed up to Tennessee Saturday so we’ll see how it does on some steeper inclines. It’ll pickup speed in 4th. easy and my trans temps have been running 160-175 degrees in 75 degree ambient.