E39, 535i, auto gearbox question.
I have a 1999, 535i with a strange whiring noise which gets worse as the engine and box get hot. I have had the ATF fluid changed but this hasnt made any difference. Can anyone tell me which auto box is fitted to this car? and is any other box compatable. I have seen the spread sheets posted on other forums but the 535 isnt listed. Any help would be apreciated.