Apparently I can only post in new members area for some stupid reason. I've already tried to post three times before so this is annoying. I'm trying to figure out how to drain and fill the ATF in my 1988 Mazda rx7. It's the original fluid and I want it out. Help. Thanks.

 

Found the dip stick. Need to find the drain and fill plugs

 

Just a guess, but the reason you can only post in the New Member section is probably because you're a new member.---> https://www.rx7club.com/new-member-r...ction-1104089/
Otherwise, it frequently gets annoying for everyone else.
Not a 2nd Gen. guy but servicing the auto transmission on your FC is probably covered in the Factory Service Manual ---> 1988 Mazda RX-7 Factory Service Manual or in one of the links available in the 2nd Gen. FAQ Sticky at the top of this section.

Kudos for wanting to do that service. It gives you a good baseline for maintenance and you end up familiarizing yourself with the car. I usually recommend to new owners that all the fluids get changed out...brake, coolant, differential and of course...oil. Brake parts, belts, plugs and possibly wires are something to consider too. Just do them one at a time with a little anti-seize.