if you take the pin out of an open diff on a 8 1/4 rear end don't spin the axle shaft because the spider gears fall out then after you hear the gears hit the ground and you start cussing you knock the drop light over and bulb breaks and you dont have any more bulbs so you have to try to figure how to put the gears back in with no light and it is 10:00 at night then after you get them back in the right way your dad comes out and spins the axle shaft and those damn gears fall out again