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      03-11-2012, 09:26 PM   #4
GregW / Oregon
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Drives: 2015 M4 Coupe, 2012 ML350
Join Date: Nov 2005
Location: Lake Oswego, OR

Posts: 7,377
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Updated diff fluid

Mine just started grinding again at 38,800 mi. in right hand parking lot turns. Diff fluid was replaced last 1/11 at 29,600 mi. My 3/9/12 service invoice (5 days before warranty expiration) read, "As per SIB 33 01 02, checked current oil installed in rear differential. At previous diff service, P.N. 83 22 9 407 768 was used. As per SIB, drained diff oil and re-filled with updated par number for M-Lock differential. P.N. 83 22 2 282 583."

Diff is now quiet. Last update to this bulletin appears to be 07/01/11, so they are using a different fluid now.
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Greg Lake Oswego, Oregon, USA
2015 M4 Coupe - Silverstone/Sakhir/CF
2012 ML350
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