I had my car on an all wheel dyno and on the second pull about 10 seconds into the deceleration both front axles broke right at the diff..

Has anyone ever seen this happen and what could be the cause??
Porsche said if the front and rear are at different speeds it could cause
problems to the front..

Thanks for any insight..

 

Wow, that is a bummer!!

It is something about the front and rear rollers being connect somehow
so they stay the exact same speed.
Calling Stephen, Kevin or Sharkey ???

 

Were the rollers connected on the Dyno? The viscous coupling is no designed to drive any kind of torque really, just to help the rears when they slip.

If they both snapped, my guess is that something in the front drivetran seized?

Now is a good time to remove all that stuff and go 100% RWD...