Quote:
Originally Posted by BMWDavid
Since the limited slip in our cars is a Torsen unit and works with gears not a clutch pack...the presence/or not of a friction modifier should not have any effect on the operation of the limited slip in the BRZ/FR-S's.
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That's what I thought too so I bought the Redline 75w90NS (no fiction modifier) but its now rough at low speed. I'm lost....