I just bought a leftover 2000 f150 4x4 extended cab 4dr. I was wondering if there is a conversion kit to allow use of manual locking hubs. I drive about 80,000 miles a year and wanted to save on the wear and tear on the fe always turning.I was thinking about using an older setup if possible in order to complete this function.

 

there are no locking hubs your truck. it uses halfshafts that are splined to the hub like in front wheel drive cars. the halfshafts always turn with the car but there is a dionnect in the front axle that seperates the front axle from the rest of the drivetrain.