It is indeed one size fits all, but i believe it is assuming a TC drain.

I cant remember the exact basic temperature, but I believe it 170
Degrees. For every ten degrees above the base temp that the trans operates at, the fluid life is cut in half. This was on an ASE test many years ago so i dont remember exact numbers, but you get the idea.

If you cruise on the highway with a mix of city driving, the 40k is probably about right. If you stoplight to stoplight a lot, change it more frequently. If you cruise on the highway only, mostly in cool weather change it less frequently. If you tow with it, change it every refuel stop.

As long as youre not really stretching it, you can skip the filter change occasionally as long as youre always keeping fresh fluid.


Hope this helps.

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2001 SLK 320 six speed manual
2014 Porsche Cayenne six speed manual

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