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      05-04-2019, 11:20 AM   #63
ThomasR
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Drives: 22 X3 M40i
Join Date: Jan 2009
Location: Albany, GA

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Quote:
Originally Posted by Antfern View Post
The rear plug is on the top and thereís is no drain plug, is it because you donít change it, just top off? It could be the reason why it is clean? Could be the only lifetime oil.
No. Just because there is no drain means nothing. Many transmissions, differentials, etc have no drains. Just like many reservoirs don't have drains like brake fluid reservoirs, power steering reservoirs, etc but still need to be drained and cleaned from time to time.
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