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So after 1200 miles on any car I own I usually flush the transmission fluid.

Dealers in NJ are discouraging me and some telling me it can't be done. They are idiots right?

I do this obviously so any break in metals are taken out.

Oil changes are comical...as high as $400!


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So after 1200 miles on any car I own I usually flush the transmission fluid.

Dealers in NJ are discouraging me and some telling me it can't be done. They are idiots right?

I do this obviously so any break in metals are taken out.

Oil changes are comical...as high as $400!


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I don’t think they are idiots. While I guess it can’t hurt it seems completely unnecessary in this day and age. I have never done that on any car and have never had an issue. But, it’s your money and if it makes you feel better, go for it.


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I like the idea of flushing fluids. But you better know exactly what type of fluid is required. BMW would not do it on my 5 speed manual X5 SUV. They stated it was a lifetime fluid. And the Mazda dealer put non-synthetic fluid in my Miata 6 speed. It became difficult to change gears, so I found the correct synthetic fluid and had a neighborhood old-school shop drain and refill the transmission for $30 (I bought and supplied the fluid). Difficult shifting was solved.

Porsche dealers may not have a lot of experience with changing the transmission fluid, so you have to be the expert
 

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Discussion Starter #4
Wow to think an LSD can go a lifetime with the same gear oil...I guess times have changed!


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Wow to think an LSD can go a lifetime with the same gear oil...I guess times have changed!


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On my BMW E39 the transmission fluid was lifetime. Or as my independent liked to say the lifetime of the transmission because they tended to last around 130k miles.
 

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Discussion Starter #7
Dealers said it was 60k first change...so oddly enough it won't be changed by me until then. They don't believe in break-in fluid changes...


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This brings me full circle, regular changes, only when needed or shorter to provide better component life?

I will be taking delivery of a new 718 next year, it may be a keeper so...

Do you complete the break in and then flush or change all lubricants in an effort to give the mechanicals the best possible start and future? To a certain extent the cost when amortized over the life of the car is low, is it worth it, will it make enough of a difference?
 

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Just follow the factory recommended maintenance schedule. Don't over think it!

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