Dexron VI is NOT fully backward compatible (Allison).
According to Allison, Dexron VI (six) is not fully backward compatible. Some seals compatible with Dexron III are not compatible with Dexron VI.
http://www.macktrucks.com/assets/mack/Service%20Bulletins/sb019006.pdf
What about Mercedes vehicles' transmissions designed for Dexron II or III? Are these seals compatible with Dexron VI?
Does MB USA have official position about Dexron VI?
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1992 300D 2.5 turbo diesel. 319 k miles.
124.128 chassis, 602.962 engine, 722.418 tranny.
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