Torsen would send power to the non locked wheel

 

Maybe you hit rev limiter

 

@ 8200 rpm in first gear you're pretty much at peak power to the wheels.
If something in the driveline, at that very moment, mechanically locks-up, long enough for you to spin and then miraculously breaks free, it will not "be fine, like it never happened" afterwards.
IMO you lost traction and spun.
It happens.

 

Can you go back to the area where it happened and check for tire marks ?. It sounds like one wheel lost traction - dirt, oil , or greasy asphalt on the road ?. If both wheels were locked by the diff you would not spin out. It would be interesting to see the marks on the road where it happened.

 

Thanks for the input every body, will do some further investigating!

 

Drain your fluid maybe something got stuck :s

 

I strongly suspect the cause of this incident is not the differential, but something else.