Keep rpm's in the power band going up. Google your engines HP/Torque curve.
Use a lower gear going down for some engine braking.
Watch the transmission temperature so it doesn't get too high.
If your truck doesn't have a trans temp gauge, get an OBD2 device that will plug into the OBD port and display the temperature.
My favorite summer trips are to the mountains and watching the trans temp is important. The most exciting and difficult was thru the Teton Pass several years ago. Mostly because I didn't realize how steep and curvy it is. This year we're going back to GlacierNP and then up to Banff and Jasper. Can't wait!
