DON'T use ATF of any flavor.... 10-30 is the way to go.... ATF can do TERRIBLE things when mixed with water..... It doesn't always happen but you can end up with the thickest nastiest pink goop ever that is a nightmare to clean out where with motor oil if some water enters the system all you get is milky oil... I would flush out the atf and run motor oil myself
to answer your question each generation of dexron atf superseded the previous generations stating that it was safe to use in applications that called for the earlier version..... Since it was never speced for power trim systems one couldn't say for sure but it SHOULD work the same and be compatible with the same materials....
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