I'm going to change the gear oil in my np205 soon.

I believe it takes 80w-90 GL-5.

I plan to just remove the drain plug, drain the old out, install plug and refill.

How many qts does it take to fill it back up?

 

4.5 pints. 80-90 will be fine.

 

Yup, buy 3 qts and put about half a quart through to rinse it first. What helps a little too if you don't have a suction gun, get a steel, 50 cent, 3/4 inch, street elbow at any hardware store. Screw it into the fill hole and you can pour the oil on that like a little funnel. You still have to go real slow for ir to take air, but it makes holding the bottle easier.

 

That's a cool trick, Redleg, thanks.