This is the same thing that happens to mine as someone else had already posted.. power steering becomes 'hard'. steering wheel suddenly becomes stiff and difficult to handle. hard to turn. choppy while turning and snaps back in increments instead of a smooth, easy return to center. feels like manual steering then returns to power steering. occurs at any speed, very dangerous at higher speeds. makes the vehicle steer 'choppy' and unpredictable. have stopped using the vehicle, causes a dangerous situation while driving and trying to maintain control of the truck. *tr