NextGen - Do you notice, does your X still downshift and rev the engine pretty high as you decelerate downhill? My 4.8 does this bad whereas my 3.0 never did it. Is this just a function of the "Sporty" programming of the 4.8? It's just horrible, sometimes my rpms will rev up to 4,000 or higher and I'm just going downhill... SO aggrivating!