You mean an Eaton Truetrac differential? That's a helical gear torque biasing diff, it's not a locker, it's not a limited slip, it's torque biasing, like the Quaife or Torsen diffs which are also torque biasing, and are indeed available for the MTX-75 and MTX-76 transaxles. I'm aware that Eaton calls the Truetrac a "limited slip differential", but it's action is that of a torque biasing or torque sensitive diff. Even their description of its action, found
here, is torque biasing.
http://www.eaton.com/EatonCom/Produ...Products/Products/Differentials/FAQ/index.htm
Limited slip diffs respond to axle (wheel)
speed differences, not torque differences.
The problem with the Phantom grip "limited slip conversion" in the Taurus SHO diff, beyond that it eliminates two of the four rather important spider gears, is that it exerts a spreading force on the sun gears, and that causes them to have less tooth engagement with the spider gears, and when gear teeth are engaged at their tips, instead of down in the stronger root of their teeth, the teeth break, and while cryo treating might delay the inevitable failure, it won't prevent it. The other problem with the Phantom Grip is that it produces it's "limited slip" action by causing the outer faces of the steel sun gears to bind against the inside surfaces of the Aluminum diff housing. As the Aluminum housing wears, the sun gears spread even further apart, the teeth engage even less, and you get the pictures in my previous post.
I'll give PG some credit, it's product works pretty well in Iron cased diffs, and apparently has decently long life, especially in lightweight cars, but in this engineer's opinion, it's a poor addition to an Aluminum cased diff.
