When you look thru the hole in the gearbox you can see all the way thru but half the hole is covered say.. Best way I can think of explaining it is, it's like a 2 pound coin in the hole with the centre knocked out if that makes sense..
It's not a bar like a non LSD box and it's not completely open like an LSD box..
Are you saying it's not cusco, ATS or Kazz or it's not Cusco but could be ATS or Kazz?
Cheers