View Single Post
      10-19-2012, 07:35 PM   #13
MilehighM3's Avatar
Drives: E90 M3
Join Date: May 2011
Location: Colorado Springs

Posts: 2,109
iTrader: (9)

It is normal. It's a characteristic of the variable M differential lock. You can also hear it in the parking lot rolling in first gear at idle and disengaging the clutch. The rattle at idle when hot is due to the use of a twin disc clutch. It's actually pretty quiet compared to the average aftermarket twin disc set up.
MilehighM3 is offline  
Reply With Quote