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r/explainlikeimfive

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Eli5 why should you not change your transmission fluid if you’ve never changed it last 10,000 miles.
Eli5 why should you not change your transmission fluid if you’ve never changed it last 10,000 miles.
Engineering

For context: I have an older Toyota 05. 160k miles. Transmission fluid looks kinda brown and mechanic said I should do a flush and quoted me 300$. I’ve also heard that at some point you shouldn’t change the transmission fluid if it has t been changed in awhile. Why is this?


Smart Trading, Sweet App
Smart Trading, Sweet App