My recently purchased Camaro is equipped with 3.73's and a posi rear end. I beleive the gears are Auburn, I'm not sure, they are supposed to be one of the strongest, and susequently one of the loudest sets of gears, which they sure are. My question is about the posi, how well is it supposed to work. In a straight line, or a brake stand, the car certainly spins both tires, and will spin both doing a donut. However, some times, one wheel will catch, and the other will continue spinning, say if one wheel was on gravel and the other pavement. When they both get back on pavement, just the one continues spinning. Obviously, I lift, as I don't want to destroy the posi, but is that normal, or the sign of a posi going bad.

One other thing, whats the difference between posi and limited slip?

Thanks.

Nothing.

JamesC

that I know of, Auburn doesn't make gears. They make posi units though.... As far as noise, it could either be something like Richmond, which use a different helix that's stronger but creates more noise, or it could be improper set-up. - From what you're describing, it sounds to me like you have a posi, but w/o pulling the cover, no one will ever know for sure. Depeding on the type of posi, what you're describing could either be wear or normal.

limited slip is just what GM calls their posi units, they're the same thing.

sounds like a normal posi to me. they aren't full contact all the time or else cornering would be a slippery thing, they're designed to give a little apart from the other tire so it doesn't screech around the corner like full lockers or welded rears will do. if you get em roastin where one is breaking free alot more than the other it fools the clutches and keeps what it thinks is the 'inside tire' from locking up fully.

Makes sense. It is richmond, that was the name that was escaping me, the noisy gear thing. Sounds like all is well. Tomorrows friday, and payday, and its drive the less fuel-effecient car to work day. Ahh, fridays.