How do you changecheck transmission fluid on 91 Honda prelude auto trans?

Put the car on a lift and find the transmission fluid drain plug (which is usually close to the passenger side front wheel). Unscrew the plug and let the fluid drain, then replace the plug and let the car down. Pop the hood and look just behind the radiator for a small dipstick, that's the tranny dipstick. Pull it out and use a funnel to re-fill it with fluid.