Can you guys let me know, how many quarts do i need to change and refill the '91 civic si manual transmission fluid?

I purchased these '91 civic SI tranny from craigslist, turns out to be the 3rd gear grind.. ssgghh...

Im just gonna buy redline manual transmission fluid hope it helps bit...

So do you guys know how many quarts do i need to buy to change and refill the '91 civic SI manual transmission fluid?


Thank you.