I'll offer that my experience with the Detroit locker has been just fine. Been running one in my 8.75 for 3 years now. People say they are noisy; I rarely hear a thing. People say they clunk in & out... I occasionally feel it "shift" or "unlock" when slowing while going around a corner, but as long as you know what it is... no big deal. Durability wise: its been bombproof. The only issue I have with it is that as you get on and off the gas, it will want to push the car left or right as it unlocks and locks. This is no big deal, until you chop the throttle a couple of times at the top end of the drag strip at 115 mph. Then, it will get your attention. As I look to do more racing over the next few years, I will likely be going to a spool partly because of that issue. If it weren't for the racing thing, I'd be happy as a could be with my locker.