Quote:
Originally Posted by Vic311
What are you hoping to achieve going with the Non FM? My understanding is the FM allows for more quiet diff operation. If your problem is not cured with the FM fluid, it is not going to be cured with the non-FM, and could mean something else is going on.
The FM fluid is also what is called for and this is the one I would use.
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I didn't want to change the operation of the LSD using a lube with more slip than the stock stuff. I understand they made it slicker to quiet the grinding. I made it 37K miles without grinding, now it grinds so why switch lube to something else that will change the way it operates if it worked well this far? I was thinking of just replacing the fluid with the stock stuff.
Now If BMW is putting the new FM stuff in all the diff's then that's a different story.