This is a function of the cruise control. It's designed to keep you at the selected speed regardless of the road's grade. When going up hill, it may downshift and apply more gas (sometimes a lot) to try to maintain your speed. When going downhill, it lets off the gas and uses the engine to keep the truck at or as close to the desired speed. It's worked this way on every cruise control equipped vehicle I've driven. It's all good.
Thanks for the help! I have never felt this before on any other vehicles with cruise, It just rolls past the set speed and resumes as you get back to the set point.
Thanks for the rapid response. I posted this on tt and didn't get much help there. I think i have found a new 'home'.
A forum community dedicated to Nissan Titan owners and enthusiasts including the 4x4 and XD. Come join the discussion about performance, modifications, classifieds, troubleshooting, maintenance, and more!