My experience is much like 383Man's with his locker. I've had both a Detroit Locker with a manual trans and a spool with a 727 and I could live with either one just fine. The locker was behind a T56 in a 9". The only time that one behaved oddly was if you were letting off the gas in a turn (which isn't a great idea anyway). It would clunk and shimmy just a bit. With any type of reduced tread depth tire and some moisture on the road, you just need to take it easy. The locker is more expensive so that's a downside, but it's very true that the spool is absolutely no fun to push the car around when it's not running. Just my 2 cents