Here is why mine leaked... (archive)

1) The fact that the leak only happens when the car is running tells you that it is likely that the leak is in one of the pressurized fluid passages rather than just a seal (not bullet proof, but more likely the case).

2) On mine, the 90 degree fitting that exits the font of the tranny and sends fluid up to the radiator for cooling split on the elbow (it is made of cheap pot metal) and caused what appeared to be a catastrophic leak of tranny fluid. The way it was leaking, it was hard to discern where the fluid was actually coming from, but it looked like it was the same breather screen that you mentioned. Turned out that the part and labor to fix it was about $50. I was relieved.

Kevin

Yesterday I started up the car (89 750iL) and backed out of the garage to lubricate all the rubbers. When I moved the car back into the garage it had left a puddle of what looks to be ATF in the driveway. Here are some facts:

1. I am less than a repair novice.

2. I have had zero transmission problems. The car has been running like a dream.

3. The leak appears to be ATF not Petosin.

4. The leak comes from an area on bottom of tranmission where there is an OPEN plastic mesh-like cover. When I look up through said open mesh-like cover, I can see gears.

5. There is a leak only when the car is running. When I shut it off, it stops leaking.

Any thoughts or suggestions. Help would be most appreciated.

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