Pinning the shaft doesn't lock anything. its all still slipper controlled. so the front and rear slip on power but now its even slip. the slipper is our center diff. and if its slipping its not locked. once pinned adjusting the slipper nut is now like changing center diff fluid. and now the car can be tuned better through the front and rear diff oils. now that the power is evenly distributed to front/rear. the great thing about this mod is all you have to do is remove the pin and put back together and its works like before. and I still recommend the basket wether you are pinned or not. it just makes it a better more controlled slipper.