i have 05 g35x with g37s on it staggered but running 245/40/19 all the way around, car feels sluggish, dropped on bc coils, when i make turns feel like im losing power have to hit the gas to accelerate, when the car is rolling its rolling really slow, also when i accelerate and take my foot off gas it takes a while to decelerate down, can this be a transfer case problem??