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      01-06-2019, 09:32 PM   #27
n00bkiller944
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Drives: '14 328d M Sport
Join Date: Mar 2018
Location: Richmond, VA

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Quote:
Originally Posted by Sweeney921 View Post
Cool. I'm putting it in my rear diff this morning then. Liqui Moly's website recommends their 75w-140 (LM4420) for F3x differential(s), but I couldn't find it for sale anywhere. Based on this thread I went ahead and got 75w-90 (LM2048).

EDIT: Looks like LM4420 is sold in the U.S., however its English part number is LM20042. Liqui Moly recommends this 75w-140 for F3x differentials, however also says that it's really intended for LSDs. Those of us with open diffs should be fine with 75w-90, which is part number LM2048.
Still good for me too! About 4k miles since the fluid change.
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