Join Date: Aug 2002
Location: Austin, TX, United States
Question about the condition of Final Drive Lube
For those of you who've changed your final drive lube and seen what comes out.
My GT has 9400 miles on it and I just changed final drive lube this weekend. (I have been told by my dealer that the gear oil had been changed by the previous owner at the 600 mile check up). I decided to do it again with an oil/filter change. The gear oil that came out concerns me...it was very black, seemed very low viscosity and after sitting for about an hour or so in the small pan I used, there was a layer of "silt" in the bottom of the pan. The magnetic fill plug (which is sort of hollow in the middle) was covered, but not what I would call excessively with the same very fine grey "silt". I now have doubts that the gear oil had ever been changed. My concern is that this was the "break in" oil that BMW accidentally sent out in some units and my dealer has just been giving me the yeah yeah, that was already done. In 8000 miles I would NOT expect, nor have I ever seen oil look that bad.
Can anyone else comment on the condition of their gear oil when drained?
I would appreciate anyone elses shared knowledge about this.