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  #11  
Old 11-29-2012, 02:16 AM
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I did my first tyranny drain and fill at 87k miles with Valvoline Dex VI. I ran that for 30k miles then drain and filled again and I'm now at my 30k mark again.

The proper procedure is to do 2 drain and fills two weeks apart (assuming you're driving everyday). Then on the third drain, drop the pan, clean it and the valve body (portion of the exposed transmission) and replace the filter and gasket.

For the GM tranny any Dexron 6 will be fine.


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  #12  
Old 11-29-2012, 04:46 AM
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Thank you Wayne's World. Visually Dexron 6 differs from BMW adopted fluid. I think compared with the old OEM that was put in the tranny in 2005 and which is an outdated fluid, any good quality will work, especially when there is no problem with the tranny. But when there is a problem (shifting error for example). A new fluid might or might not help even when the fluid if fully flushed. Things may get worse as the new nice fluid may induce more slipping due to its viscosity and density. Unless the problem starts to be annoying (trans failsafe prog) I would not suggest to replaced oil and as a safety measure I would not use other than OEM fluid. All of this is based on reading a lots of posts regarding this issue & I just came to this conclusion. Have a nice day
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  #13  
Old 11-29-2012, 10:33 AM
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Goldenbird, BMW dealer sell Dexron VI as their OEM fluid for our 2004-2006 GM tranny. It's ~$20.00 for 4-quart bottle. You need 4 of them for partial fluid change. A year ago when my X5 was 90K miles and shifting good since then.
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  #14  
Old 11-29-2012, 03:01 PM
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Thank you startx5. I appreciate your answer and your experience with Dexron 6
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  #15  
Old 12-01-2012, 01:48 PM
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I used Valvoline Dexron VI fluid on my 04 3.0 and have no issues since I did my flush and filter change at around 100k. I'm now at 129K.
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