Matthew,
i am using that same gearbox in my rf gt40 behind dohc 4.6 ford.the box comes from behind 120kw turbo diesel in a4 a6 and a8,there are two models of this box the only difference i can see with my info is output flange diameter 88mm and 130mm.as to the internals it as big as 01e but newer box so i am hoping better.
ratios are
final drive 3.875 1st 3.556 2nd 1.905 3rd 1.241 4th 0.882 5th 0.659 6th 0.558
cheers Ali