Originally Posted by gomer_110

If you're tracking the car don't bother with a helical (Quaife or Wavetrac), just go straight to a clutch-type (OS Giken or Cusco).



The problem with the helical types is that as soon as you unload the inside wheel, it will effectively turns into an open diff creating unpredictable power down handling. In theory the Wavetrac should be slightly better than the Quaife in this department but it still isn't a proper clutch type diff.



And fwiw, I'm telling you this because I wasted a bunch of money putting a Quaife in my car only to end up replacing it with a Cusco. Don't make the same mistake as me.