Atf for 904/999 transmission

Just googled trans fluid (F) at Walmart. Considering that "name brand" type F is $13-14 a quart, and Walmart house brand is $18.50 a GALLON, I know what I am gonna try next time.
The 18 dollar stuff at Walmart is dextron 3 that's why I was wondering if its ok to run dextron