Transmission Leak
 

I noticed a little bit of a leak coming from the middle of the X. I get under there and towards the back of the tranny, up above the pan the leak is coming from this part. Any one know what this is? Is it a common thing? Any help would be greatly appreciated. Thanks!

http://img201.imageshack.us/img201/5838/transleak.jpg

Can’t quite tell from the photo but it could be the O-rings on the sleeve for the multipin connector to the mechatronic unit which are leaking

http://i260.photobucket.com/albums/i...HP26Casing.jpg

http://i260.photobucket.com/albums/i.../Connector.jpg

http://i260.photobucket.com/albums/i...7588725BMW.jpg

http://i260.photobucket.com/albums/i...tronicUnit.jpg

The sleeve part number is 24347588725. The sump pan has to be removed to provide access to the sleeve’s retaining clip.

Phil

It looks like the sleeve to me too.

Quite common problem. You will need to drop the pan to unlock the sleeve from the inside, to replace it with a new one.
So, you will need 6L of transmission fluid, a pan gasket and filter (if metal pan) or a new pan (if plastic).

I did mine while changing my fluid and it is quite simple.

There is a procedure on this site:
ZF 6HP26 Sleeve Replacement by wilson009 pdf free ebook download from bmw.tech.officelive.com

Damn, you guys are right on. It is the sealing sleeve. I read that a shop should do this repair as its tricky seating the sleeve or something along those lines. Plus I have the pan with both fill/drain bolts on the bottom. How the hell does that work!?

My oil pan also has both plugs at the bottom.
The filling hole is like a tube going up inside the pan, at the level where the fluid needs to be. So, the fluid will overflow lets say 3 inches from the bottom of the pan.

The way this tube is made is like a 'T'. There are 2 openings on each side of the 'T' and the top is blocked. When you remove the filling plug, just poke with your finger inside the hole and you will feel on the wall a hole at 90°. You have to feed a flexible hose inside that hole by pushing it with your finger.

At the beginning I tought that it was a weird way of filling a transmission vs the side plug, but now that I've done it, I find it more convenient since you don't have the exhaust tube in the way.

Yea he will see how it works as soon as he gets the pan off anyway. To do this job, get oe fluids, and a new gasket. Oh the parts for the job itself.

Ahh ok. Thanks for the info. Is there a preferred method of measuring the fluid temp? Can I use an IR thermometer pointed at the pan? The temp seems to be the crucial part of this process. Want to make sure i get it right.