I need to know what kind of transmission fluid I need to use for a 1994 Honda Civic with a manual transmission?

This link might help:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-46563.html#post219991

Otherwise, use Genuine Honda Manual Transmission Fluid.

Here's how to do the work yourself:

https://www.askmehelpdesk.com/cars-trucks/faq-how-troubleshoot-repair-maintain-hondas-46563-6.html#post625247