I'm going to change my transmission fluid and don't know what to do about this filter. Should I replace it with a new one or put a longer piece of hose in its place?

 

It looks like its been in there a while. If you can find a new one, replace it. Otherwise remove it and put a piece of high pressure hose in its place.

 

the old auto zone 2210 magenfine filter is no longer available at auto zone. BUT i did find the same thing as JX-160 brand-- ATP. at a real parts house uses 3/8" tube. ONLY use high pressure hose. SAE J1019 217 psi working. NOT fuel hose for a carb engine.