Originally posted by Crazy Mopar Guy
I see no reason not to run a posi, maybe the drag racer thought it was a spool that should never be used on the street?!?!
I think that's the case. There is a huge difference in a posi unit and a spool. Serious drag racers (who don't drive there car anywhere but on the strip) will use a spool and I'm sure that's what he is against using. Spools are simply not made for street use because they mechanically prohibit the rear wheels from rotating at different rates when going around a corner. A posi differential is designed to allow the wheels to rotate differently but still direct the power to both wheels when needed.