Depends on which rearend you are using. I have a Detroit Locker in the S60 under my Duster but I'm going to replace it with a Strange S-Trac. The Locker works great at the track but it behaves weird on the street. I have a S-Trac in the S60 under my Coronet and it is better behaved on the street than the Locker. So I've tried them both and I'm switching to the S-Trac.
