In British Columbia they only have 2 wheel dyno's. Took by 996 TT in and all they did was static test at idle and slight revving. No dyno at all.

John in Vancouver

 

Hey Stephen, I'm a mechanic at Furtmair and I worked on your car. I couldn't believe they put it on a dyno for e-test.
We spun the rear wheels by hand and tried to hold the fronts from spinning. It was tought to keep them stopped, so I'd say your viscous coupling is fine. Probably not 100% but its not ruined.
Not sure if Uli mentioned that to you or not.

BTW, your Techart (sp?) lowering springs makes putting your car on the hoist a real pain in the @$# haha. Very nice car though.