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      03-11-2018, 09:13 PM   #2
Polo08816
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Drives: 2014 335i M Sport
Join Date: Sep 2010
Location: MD

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Quote:
Originally Posted by ThomasR View Post
A word of advice. Change it.

My 2015 X3 has 70k. I'm changing all the drivetrain fluids for the first time. Front and Rear diffs, transfer case and transmission oil and pan. This weekend I started on the diffs.

The rear diff oil was very clean and looked great. The front diff however looked dark and very used. There is no drain plug for the rear so you have to use a siphon like this one that I used:



And to pump it back in:



The front has a drain and fill plug. You do not have to remove the stiffening plate to change the front. I didn't. Make sure you break the fill plug loose first in case you find it is seized.

All fill and drain plugs are a 14mm allen. All fill plugs and drain should be torqued to 60nm.

Each require just under a quart. I used this for front and rear:



The manual calls for BMW 83 22 9 407 768 and this part number is listed as the direct replacement oil from Red Line for that part number.

The interesting thing is the front and rear diffs seem to require different BMW part numbers for diff/gear oil.
Appreciate 0