so i found a truck at pick and pull, anyhow said Detroit locker on it (sticker), both hubs turned the same direction as well as the drive shaft turning. figured i'd take it apart (my chevy has a dana 60 in it), so i pulled the axles, pulled off the diff cover- and WTF poser!!! looks like an open diff... but with only one axle in it, it still turns the ring gear hmmmm.... so i pull it out and it has clutch disks in it! so i was like maybe detroit made a posi or LSD....? anyhow took it home for 60 bucks (the frickin window person said it wasnt a mechanical part and my 25% off coupon wasnt good! she called it a suspension part!!!!), had 3.83's in it i think (although the ring gear says 46 13- i counted 12 pinion teeth- i have a 3.54 in my truck now). so i googled lockers and found a website that called it a Dana trac-lok... dunno if that's what it is but it is better than an open diff! i feel so screwed by P&P though... gah. anyone got some 4.10 ring and pinion they want to sell cheap?