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Old 10-23-2012, 07:40 PM   #1
M3DIY
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Question Refill procedure for AT with drained Torque Converter

What is the proper procedure for doing a full refill after a complete drain of the Automatic Tranny including the Torque Converter?
The AT was removed and completely drained including the TC.

The Bentley says the fluid capacity is :
8.9 liters with (which I assume to mean including refilling the TC)
6.2 liters without

What I need to know is do I just put the entire 8.9 liters in the fill plug or do I need to put about 3 liters or so in the TC. then install? And does this seem like the correct amount of fluid because it seems like a lot.
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Old 10-23-2012, 08:19 PM   #2
jfoj
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Personally I would put enough fluid in the torque converter to fill it about half way.

Then you have to fill the trans like a manual trans, BUT, you have to fill the trans with the engine running and the fluid should be about 100F?? and you fill until the fluid just starts to drip back out the fill plug, with the engine running and trans fluid about 100F.

I need to check for sure on the temp, but this is the way some of the other German auto trans are filled.
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Old 10-24-2012, 09:01 AM   #3
jfoj
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Follow up on transmission fluid temperature for proper level checking.

Manual says 85-120F fluid temp. So 100F is right about mid range as I thought. IR Thermometer to the bottom trans pan is a good check, otherwise a palm on the trans pan could also work.

120F is borderline scalding temps so be careful with the fluid and hand on the pan. You should be able to keep your hand on the pan at 100F, it will feel warm, but you would not pull your hand back at this temp. Above 100F, you would not leave your hand on the pan long.

Check with fluid warmed up, transmission in park, car level, remove filler plug and if a small stream of fluid runs out, then the level is correct. If no fluid runs out, then fill until fluid just starts to stream out.

Note, these cars do take a lot of transmission fluid.

You should fill the trans cold/empty unit the fluid just starts to pour out. Since your torque converter is likely low, I am expecting that your fluid level will drop once the engine is started. Cycle the transmission trough the gears with your foot on the brake. The I would check the level to make sure it did not drop 1 qt or more just for the converter filling up.

Note, DO NOT TURN OFF THE ENGINE WITH THE TRANS FILLER PLUG OUT, YOU WILL LOOSE FLUID!!!

I would have a clean catch pan as you may be able to reuse the fluid that leaks out.

I personally would also check the fluid after about 1 week of driving since you actually had the trans out of the car and very empty. This way you can be sure your level is correct once the fluid had fully circulated and filled every location within the transmission.
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Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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