This looks like a good way to get more of the new fluid in but my transmission has no dipstick. Here, he used the dipstick tube to put in 4 quarts so I couldn't do it that way, could this also be done by filling what you can through the hole on top of casing of the pan?
Last year I dropped my pan and changed fluid and filter using Mobile 1 ATF. I’m gonna do it again this winter but want to use Amsoil, any danger of a little mixture of the two? I have a 17 SLT 5.3 8 speed. Thanks in advance!