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      05-31-2011, 11:49 PM   #3
CarbonDuc27
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Drives: 07 E90 335i, Duc M750, 05Mada
Join Date: May 2011
Location: Stockton CA

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The mechantronic sealing sleeve is locatated just above the pan on the right side of the tranny. It protect some plugin. Older ones are known to leak (mine left a small puddle after seating for 3-4 days).

Stupid thing is the locking mechanism to hold it in place is IN the oil pan so you have to do it all.

The part is cheap- $10. Plus the pan gasket and oil.

Not required in a tranny oil change but if you have a leak it may be the culprit.