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Toyota does not recommend the use of the multi purpose ATF ,the right fluid is the genuine Toyota ATF type WS but once you are not draining and filling the transmission in my opinion 1or 2 quarts (it take 3.7 quarts) of multi purpose atf will not cause any damage to your transmission until you have the chance of correcting the problem , I mean ,draining and filling the transmission with the right fluid.
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