wat abt for manual transmission? when should i replace the fluid?

 

If the fluid is 1 or 2mm high on the dipstick, probably sorta OK.

I'm pretty sure air works itself out naturally, since the repair manuals don't tell you about any bleeding procedure.

I've also heard flushing isn't recommended for Honda autos. Flushing machines typically use a solvent additive, & I think that's the problem.