Thanks for the response and if I understand you correctly if one was to install a kit like Doc made you would not be able to tell the difference when driving the truck? The difference being the def vs the disco trans.

Resurrecting this thread if you don't mind. In the eight months or so since you installed this conversion, how is it working? Any pros or cons to using the discovery box in the defender? I ask as I'm about to fit a 300tdi to my 90 which came from a discovery with the discovery box. I also...