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I did the ATF flush with a full case of Mobil 3309. The fluid had 100k miles. It did help the car shift smoother. Everywhere I read you need 16 litres/quarts. I figured I would do the 12 quarts now and in another 30k do 16 quarts.
If the fluid is a lot clearer after 12 quarts, although not quite 'perfect', I would think four more is not going to make a big difference and I can wait for now.
Is there some special reason to flush more than 12 quarts?
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I'm stuck on Volvo and Volvo's stuck on me....
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