Learn me about differentials

[bionicbelly]

Hi all,

New to the 1 series, and will be beginning my build soon. I have a pretty good about what I will be doing for the most part, but I need some help with differentials. I see a couple for sale in the FS section, and pretty much what I want. Helical diffs with slightly lower, or stock gearing.

So my questions are, what are the different 1 series diffs, what did they come in, and what is interchangeable? FYI- I have a 2010 128 with a manual. Do any 3 series diffs bolt in?

[rac]

http://www.vacmotorsports.com/news/335i-and-135i-differential-faq-no-lsd-really-1483338466.html

There is some decent info in there including a reference table.

[bionicbelly]

Unfortunately, not a thing about 128's. Everything in that article is 135/335 based. Thanks though. It does look like the 135 AT/MY differentials are different.