Grant & Eracer76,

Nope... these dynos have the rollers linked to get around at least major issues with modern vehicles.

1. AWD vehicles with special computer controlled limited slip transfer cases.

2. RWD vehicles that have a ESP (Electronic Stability Program) in which the computer gets REALLY annoyed with the front wheels standing still and the rear wheels spinning like mad. Generally the ESP thinks you are spinning tires in the rain or mud and it cuts the engine power down to protect the drive train.

Hope that helps.