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Old 03-26-2010, 08:35 AM
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GCoop GCoop is offline
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Location: Charlottesville VA
Join Date: Jan 2009
Posts: 438
Mein Auto: 2004 325xi
Just for reference I'll post up some of the information I found when researching whether Dexron VI was now appropriate for the GM 5L40E tranny. As some may have already discovered, Cadillac uses the 5L40E transmission in some of the 1999-? CTS models and GM says Dexron VI is now appropriate for them as it is backwards compatible with the Dexron III original fill.

What many folks dont know is that just because GM chose the same name for the BMW/CTS transmissions (5L40E) doesnt mean that they are the exact same transmission. Refer to the attachments for the specific examples.

What I was never able to conclude with taking the specific differences into account is whether the Dex VI would then indeed be recomended by GM for the BMW 5L40E. More than likely it would be just fine (As BMW has superceded the original ETL-8072 part # with a Dexron VI part #) but would it be preferred to the original fill? That is the question.*Note: I ended up going with the Castrol Import Multivehichle ATF for my fill and drain refill cycles as it meets the ETL-8072b spec.

Obviously we can obsess about this to no end but as Starless has shown -- For peice of mind you can not go wrong with what was put in there originally.

The next question will be what do for peice of mind when we can no longer get the original fill anywhere?
Attached Files
File Type: pdf 06W87.pdf (196.7 KB, 1314 views)
File Type: pdf 06W90.pdf (70.4 KB, 977 views)
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