Transmission fluid
Thanks, Rick.
Tip: Measure how much fluid is drained out. It'll probably be close to 7 quarts. After everything is buttoned back up, refill with 4 quarts of new fluid, start engine, leave in park, then top off with the remaining amount.
You should be able to use any transmission fluid that meets the specification for your transmission, probably Dexron II or III. Check this link



