Best transmission fluis additives according to redditors

200K miles on a gearbox with original transmission fluid is absolutely incredible.

Im sure it was changed once or twice. But that said, it couldnt hurt to spend $80 in fluid and a filter and try and replace it.

Its almost as easy as doing an oil change on the car.

Edit:

Fluid

Filter

I had it changed, not flushed. But after adding some redline and a bottle of this, never shifted better https://www.amazon.com/dp/B001DKV5H8?psc=1&ref=ppx_pop_dt_b_product_details

You have a 5-speed automatic transmission. CVTs do not have gears, so if your shifter says P-R-N-D-3-2-1 or something with numbers below 'D' then you have a normal transmission: in which case it takes Honda DW-1 automatic transmission fluid. If for whatever odd reason you do have a CVT you should be able to tell by looking for the transmission dipstick/fill plug it will have a label right on it that says CVT (Then it would take Honda CVT-1 fluid). If no label, pull the dipstick and if the fluid is pink or red (or off-red brown [old dirty fluid]) then you can be sure it's regular ATF: use Honda DW-1 fluid. For every drain and refill you will use almost 3 quarts. If your fluid is dirtier/old then you may have to do this process over a couple times (almost 3 quarts each time).

I did some googlin' and this appears to be a common issue.

• The Bad News - The root cause is an internal transmission seal that dries up and shrinks thereby preventing proper pressure buildup. Probably a $4.00 part, but you have to tear down the tranny to replace it.
  
  
• The Possibly Good News - Some people have corrected the issue using a product called Trans-X.
  
  Source
  

If you are overdue then get an addtive llike the prolong one.

https://www.amazon.com/Prolong-Super-Lubricants-PSL15000-Transmission/dp/B001DKV5H8