Quote:
Originally Posted by BB_cuda
I do know that 330d with M57 can swap a manual trans into a M57 335D. I'm told the 330D diff needs to be part of the swap. This is due to the final gear on the 335D auto is a deeper overdrive than that of the 330D manual top gear. The 330d diff makes up for this with a numerically lower ratio. Doing both in the swap keeps your RPMs down on the freeway.
You need to compare the diff ratio on your manual N57 to that of what I point to above.
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Yeah I was thinking if I just swapped the box & diff together, then the ratios wouldn't be any different to they are currently. I have read that using a manual box with the auto diff doesn't work and leaves you with overall too short gearing.
Does anyone know if the N57 MT gearbox, clutch, flywheel etc will bolt up to an M57 335d? If I had to source an M57 manual car to do the job then it's dead in the water, I'm only considering it because I have the bits already from this broken one.