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Similar surprise... Posted by MI-Roger [Email] ![]() ![]() In Reply to: auto transmission fluid question, frank ![]() |
I recently went to buy 4 qts of Texaco Dexron-III to do a drain & re-fill of the auto box on my 2000lpt. Texaco's fluid is now called MD-3, rather than Dexron-III.
As Anders explained it, the name is an acronym for Mercor/Dexron-III. Some Mercury tranmissions used Dexron-III rather than the Type-F ATF specified for Ford transmissions. Type-F fluid is prefered in the drag racing community because it results in more aggresive clutch engagement than Dexron-III. The smoother shifts with Dexron-III may explain why Ford's Mercury Div used this GM spec fluid.
GM, for some reason, decided to no longer license the Dexron-III name so oil suppliers could sell ATF product with that identifier. At the same time they released Dexron-VI which is backwards compatible. So far I have not seen Dexron-VI in any stores.
Nearly simultaneous to all of this, Saab is using an Aisin-Warner automatic transmission which requires Saab/Mobil/Toyota 3309 fluid. This leads to the natural question "How similar is Dexron-VI to 3309?" I certainly wouldn't risk a transmission by assuming the two fluids are identical, but I still wonder.
And we can't use ATF in the power steering systems anymore either. Things just keep changing......
posted by 198.208.25...
_______________________________________ Saabs owned: 2008 9-5 Aero Sedan, sold at 227K miles 2006 9-3SC 2.0T - Wife's daily driver 2000 Viggen Convertible - Sold May, 2022 1964 Quantum IV Formula Car - Retirement project 2000 9-5lpt Sedan, sold at 318K miles
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