These conversion kits from Superwinch convert your full time 4WD Ford or Chevy truck with an NP203 transfer case to part time. By disconnecting the front drivetrain when in 2WD, you eliminate excessive wear, and with less drag on the engine, you get better gas mileage, too. These kits include all required components, maintain the stock transfer case shifter and shift pattern, and install easily with common hand tools.