Hi. I've a '99 S4 engine in a mid engine special. Currently running a 2wd gearbox from a 2.6 V6 petrol cabriolet but the gearing is way too low, 4250rpm at 80 mph. Does anyone know if I can fit a box from a V6 diesel? they look the same. If not does anyone know what the longest geared box I can use is? Not worried about mounts or gear linkage being the same as I can change them. Thanks