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100K+ Transmission Myth

by DURABLEOILCOM
3 replies
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Have any shops told you about the 100K+ Transmission Myth? Apparently every mechanic recommends that you do not change transmission fluid if it has never been serviced before 100,000 miles. Claiming that changing it will cause the transmission to slip or cease to work all together. Is there truth to this notion?

​​​​​​Have any of you guys personally known of somebody never changing their transmission fluid till after 100,000 miles then doing a drain and fill with zero issues?
  • Profile picture of the author BigFrank
    Banned
    Ask.com.

    Frank
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  • Profile picture of the author Gary Chapple
    Not uncommon these days to find original fluid being used, but it does not perform as well as new and will have bits of swarf etc. Best plan is to change one third to one half and see how you get on for a few weeks if all good go for the rest.
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  • Profile picture of the author yukon
    Banned
    Originally Posted by DURABLEOILCOM View Post

    Have any shops told you about the 100K+ Transmission Myth? Apparently every mechanic recommends that you do not change transmission fluid if it has never been serviced before 100,000 miles. Claiming that changing it will cause the transmission to slip or cease to work all together. Is there truth to this notion?

    ​​​​​​Have any of you guys personally known of somebody never changing their transmission fluid till after 100,000 miles then doing a drain and fill with zero issues?

    You had one job, to know about automotive fluids.
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