Greetings, I just returned from my first long trip (3000 miles) with my 2002 4x4 sc (supercharged) w/ auto tranny and I have some questions about "normal" operation. During our trip the truck was loaded with four people, camping gear, and assorted stuff for a month long trip. We had two ski boxes on the top and a hitch mounted rack on back. My question regards shifting behavior. The truck would drop out of overdrive at the slightest throttle increase. I was turning 4000 rpm going up hills in North Carolina at 75 mph. This seemed a little high for a v-6 supercharged engine even with a heavy load. During our trip I drove the xterra without the load and it behaved in a similar way. Is this normal or is something wrong?