Trans flush vs drain and fill

In the never ending saga of wanting more than my budget allow, the Saab needs some preventative maintenance to extend its life until the budget allows for a CTS. It is time for a trans service. I’ve only found information online about drain and fill. My mileage puts me at the interval for a flush.
Is it possible to flush the transmission in your driveway?

A drain and fill takes about 4 qts while a flush takes just shy of 8 qts. Should I just do a couple drain and fills? That should get most of the fluid swapped. Right?


For your time.

Illustration for article titled Trans flush vs drain and fill

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