I just purchased an 08 Explorer 4x4. Has a 4.0L V6. When I take off, it hits 3rd gear, andbthen the TCS light starts blinking, and it gets sluggish for a moment then starts accelerating again. Also, when the engine is cold, at a steady speed under 45mph, the engine revs down for a moment as if the transmission disengaged. I believe it's a transfer case issue. May also be a sensor issue. Can anyone confirm or refute?