I've still got my "Saturday Night" gears on a spool, a set of 6.0's....Hopefully someday I might again have something that's worth putting them into!!!! A spool can be rough on most all of the suspension and steering on a car if you get into a place where you have to turn a bit too sharp!!!! The old noisy, clanking Detroit Locker is still IMO the toughest and most fool proof posi unit, but the new Tru-Trac units are as Roger said, a very smooth posi for the street!!

(But for Saturday night stoplight wars, 6.0's on a spool is still the most fun way to play!!!!!!!!)