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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 01-15-2015, 12:00 PM   #1
Mario0617
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Join Date: Jan 2014
Location: Orlando
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My Ride: 2003 325i
Super weird oil leak

Hey gents.

I recently had a weirdo OFHG leak, which is fixed and cleaned up after. However, after changing my oil today, I noticed oil leaking from this linkage ((I think) attached to the driver side of my GM Autobox.



Does anybody know what in the heck this is?

FWIW, It SEEMS like engine oil. It doesn't smell sweet. My ATF is ~20k miles old. Car is at 100k.

I swear on a stack of bibles, this autobox has been the bane of my existence.

http://realoem.com/bmw/showparts.do?...03&hg=25&fg=20

I think that this is what I'm looking at ^

Last edited by Mario0617; 01-15-2015 at 12:06 PM.
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Old 01-15-2015, 12:04 PM   #2
Mario0617
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I should note that I tried to feel about on that mounting bracket above it, and I couldn't feel anywhere where it was wet. But I have no idea if it could be running from somewhere farther up or what.
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Old 01-15-2015, 12:07 PM   #3
David F
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Leak is probably coming from the gear selector rod seal. This seal is very difficult to change as it is very small and the rod cannot (easily) be removed to aid in the removal of the seal. I have only attempted to change the seal with the transmission removed. Even then it is tricky. My method is carefully drill a small hole in the face of seal and use a #4 sheetmetal screw in the hole to pull the seal out. Not sure how you would do that with the trans in the car. Maybe a right angle drill chuck.
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Old 01-15-2015, 12:12 PM   #4
brea
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looks like the right part in the link and that looks like it might be ATF to me. not familiar with the a/t set up on the e46 but are there any trans cooler lines nearby?
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Old 01-15-2015, 12:23 PM   #5
David F
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Part #2 is the seal that is leaking the ATF:

http://realoem.com/bmw/showparts.do?...87&hg=24&fg=15
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Old 01-15-2015, 01:05 PM   #6
Mario0617
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Ugh. This autobox is going to be the death of me.
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Old 03-04-2015, 01:12 AM   #7
chris805
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I too am very interested in this leak as I have the same kind of leak on my 2003 325i sedan. I like having my car in good shape without any leaks but this fix seems difficult to do, I don't see any leaks ever in the driveway so I figured if its even worth it to change the seal since the leak seems to be small.
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