From realoem the AT/MT replacement part numbers are different, can it be just different fitment into the engine bays, or different HP ratings do require reinforced components on the high HP engines?
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rear axle output shafts -- 320i: 28mm; 328i: 31mm; 335i: 35mm
drive shafts for AT -- 320i: 1563mm; 328i: 1539mm; 335i:1508.5mm
335i AT:
Rmfd automatic transmission EH GA8HP45Z 1 09/2012 24008601194
328i AT:
Rmfd automatic transmission EH GA8HP45Z 1 09/2012 24008609706
320i AT:
Rmfd automatic transmission EH GA8HP45Z 1 09/2012 24008609707
335i MT:
Rmfd-6 speed gearbox GS6-45BZ - THY8 1 23007617492
328i MT:
Rmfd-6 speed gearbox GS6-17BG - TAU0 1 23007633990
328i MT:
Rmfd-6 speed gearbox GS6-17BG - TAY9 1 23007633989