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Old 05-20-2012, 09:49 AM
PSUEng PSUEng is offline
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Location: SE
 
Join Date: Oct 2010
Posts: 383
Mein Auto: 2007 X3
2007+ ATF Change--Who's Done it? Input Needed

So I have all my BMW Dex VI fluid and I'm all ready to go on my transmission fluid drain and fill. But I've got a few questions for those who have done this job on a 2007+.

1: Did you have any issues getting the fluid back in due to the location of the fill plug? I have a hand pump and it's got about 3 feet of flexible tubing--but the fill plug is directly forward of some transfer case mounting parts so it looks like a very tight fit to get a hose in that fill hole. I really want to do this but the last thing I want is to crack it all open and not be able to get the fluid back in.

2: Did you find your drain plug to be very corroded? Mine is horrible. I've got a new one to replace, but I'm concerned with rounding off the 5mm hex key geometry when removing the existing plug.

3: For final top off, the car has to be running, in park, and the trans temp 85 - 120 degrees (or thereabouts). So without having the car plugged to a diagnostic computer, how best do you tell if the fluid is warm enough?

4: Is it acceptable to drain the fluid, then fill it, turn on the car and top off in Park, then drive it around to warm it up and cycle through the drive gears, then do a final top off? Or would the fluid level be too low after the first top off to drive around, prior to the last top off?

Below is a pic of my corroded drain plug--2007 with only 63,000 miles. Also, you can see the fill plug directly above the drain--not the best location for re-fill.
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Last edited by PSUEng; 05-20-2012 at 09:50 AM.
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