How do you check fluid in 63 Corvair Monza 90 standard transmission?

To check the fluid in a 1963 Corvair Monza 90 standard transmission, start by locating the transmission fill plug, typically found on the side of the transmission case. With the vehicle on a level surface, remove the fill plug and check the fluid level; it should be just below the edge of the fill hole. If necessary, add the appropriate type of Transmission Fluid until it reaches the correct level. Always ensure the transmission fluid is clean and free from contamination.