I think what Valkyrie is saying is that when you convert a quattro box to 2wd, it is more prone to failure. When Audi/Getrag (I think) designed the box, they sized the front wheel drive components such that they would only really ever see half as much torque, since the balance would be going to...
Do you have power and torque curves for the engine? It might be a bit more revealing to superimpose them over the road load plot to find out which transmission is better fitted to the vehicle.
How many people are using non-ford derived engines in their projects? I am half considering using a tuned Audi 4.2L V8 in my project; has anyone tried this?
I also read that the 01X is sort of difficult to get here in the states. I read that the more powerful engines here (4.2L v8 and TDI) are all QUATTRO in the US. Is there any validity to this? Does anyone know a good source for 01X transmissions?