When ever I go into a slow turn (like out of the diveway or in the parking lot) the drive line binds up like the different differentials are not working. I've serviced the transfer case and both axles and added the friction modifiers (even though the rear axle is not a posi). The problem is still present. Anyone have this problem before? On the all wheel drive models does the transfer case incorporate a differential to allow a split between the front and rear?