When towing with my ram diesel how do I tell when I should downshift. it seems to tow so easy, but slows when going uphill at 60 what should my rpm show.
If you have either auto, it will downshift when it can't hold the gear whether you have it in tow/haul or not. Presuming you have a G56 then. Pulling a hill at 60 with 3.42s and a trailer in tow would be right about the time I'd downshift. With 3.73s and close to OE size tires and likely more power than your truck if its stock, I'm downshifting at 55-60 up hills under load.