Originally Posted By: Corollaman
Thanks for the help, it is a 10mm hex, I found a 10mm hex mounted on a 3/8 socket that I will use for the job. I believe I can get around 3.5 quarts out with just a simple drain and fill, I think the system holds 6.9 quarts total but not positive. I was thinking of doing this every 20,000 miles or two years, I've never been a fan of lifetime fluids of any sort.
What fluid does your Corolla take?...WS???
Deffinately do a good maintenance schedule but, make sure you're not wasting ATF and your money every 20K miles...Just a thought!