pachyderm
macrumors G5
Audi did that with their R8 Le Mans Prototypes. They could swap the entire back end of the car with the transmission, differential and suspension parts in under 5 minutes.
The Automobile Club de l'Ouest (ACO), organizers of the 24 Hours of Le Mans, moved quickly to ban it because it was such a massive advantage (a gearbox change in a traditional LMP900 normally took upwards of three hours).
What a shame! That's pretty cool tech!