negantem non est
AO Silver Member
Join Date: Jun 2011
I imagine yes its technically possible.
Gear box, transfer box, prop shaft, rear diff, rear suspension set up, drive shafts, rear hubs and all associated supports and engine mounts. Its a lot of parts and then you would have to tell the ECU some how.
The car was always designed to take the four wheel drive system way before they released any production models, but as to if there are any subtle changes to the floor pan specific to the Q4 I don't know.