Joined
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12,300 Posts
Doubtful. ATF+4 is better in every way - higher temp rating, better viscosity, synthetic for longer life. I have run it in my truck, which took Dexron II, for over 60K miles now, and it never ran better. Chrysler recommends it as the replacement for all automatic transmission fluids from the Torqueflite on up. Can you cite any studies or data?