Originally Posted by hallstevenson
Easy - drain it hot and let it cool. Heck, get it hot and let it drain for an hour, 2 hours, etc. You'll get an add'l 2.7 ounces out by waiting hours and it will also cool down in the process. Then you measure that amount. My experience: It doesn't expand enough to matter. I tried this twice with two different cars. On one car, I use a scan tool and got the ATF up to 190º F while driving it, drove home and up on the ramps. Within 15 minutes I had it drained and transferred to a bottle with measurement markings. I let it cool for 90+ minutes. It decreased in temperature to between 75-80º F and guess how much it decreased in volume ? None.
Good to know, thanks.