How often should you replace transmission fluid and what type of fluid?

Here is the information on changing the transmission fluid in your car. You should change out the fluid every 80,000 miles.

TYPE .................... SG

Above 20°F (-7°C) .................... 30
Above 0°F (-18°C) .................... 20W-40
All temperatures .................... 10W-30*, 10W-40*
* Preferred.

CAPACITY, Refill:
1986-87:
4-speed .................... 2.3 liters 4.8 pints
5-speed:
Accord, Prelude .................... 2.4 liters 5.0 pints
Civic .................... 2.3 liters 4.8 pints

1988-91:
Civic, CRX, 2WD .................... 1.8 liters 3.8 pints
4WD .................... 2.3 liters 4.8 pints
Prelude .................... 1.9 liters 4.0 pints
Accord, 1988-89 .................... 2.3 liters 4.8 pints
Accord, 1990-91 .................... 1.9 liters 4.0 pints

Also, here is a guide on how the job is done step by step on a similar car but the process is the same:

https://www.2carpros.com/articles/how-to-service-a-manual-transmission

Check out the images (below). Please let us know if you need anything else to get the problem fixed.