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      02-03-2019, 01:13 PM   #3
NumericalIntegration
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Drives: 2006 325i
Join Date: May 2018
Location: St. Louis, MO

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Quote:
Originally Posted by Efthreeoh View Post
That is the shift shaft, not the vent cap. The fluid can leak from the shaft seal, but it is very little if it does; you'd never smell it from inside the cabin. Are you sure you just didn't get the new trans oil on the upholstery and that is what you are smelling? It's not possible to overfill the transmission if the car is level when you refill it. When the fluid starts to dribble out of the fill hole the trans is correctly filled.
I'm sure it isn't on any upholstery inside because I never smell it unless I'm accelerating quickly and even then it's not always. When I was doing the change I did make quite a mess putting the second bottle in so I guess it's possible I splashed some near the exhaust so it could be smelling when it gets hot?

I asked about overfilling because that's the only other explanation I can think of but I also am unfamiliar with how the vent works.
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