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Hey unDummy,
just an FYI: Honda does not recommend ATF flushes so I am only doing drain and fills right now unDummy.
Hey 6VV6 just an FYI -- for you ,
Just so you know , there is nothing special , strange or weird about your specific Honda AT that prevents a proper low pressure forward flush from a clean machine , operating with the correct pressures/pressure "method" , and using an appropriate fluid from being done for good effect .
I don't do this on a Honda - because partial drain fills every 5-15k work at least as well , in most cases much better, and can save money , sometimes the really big money .
Since things are now so confused and inaccurate on this thread lets look at what Honda is saying to do for severe service on your Accord and the real information behind it .
As noted previously , at 60k on the severe schedule , they want you to do a series of partial drains in rapid succession with a little driving in between .
Using the AMSOIL look up guide for volume capacities , the
correct information on your vehicle in this regard is that every 60k they want you to drain and fill 3.1 quarts
four times in a row using a total of 3.1x4 or 12.4 quarts of fluid .
Since your total AT capacity is 7.6 quarts , if you do this , you will use 12.4 quarts of atf to change 88.59% of your 7.6 quart capacity , or put another way , Honda wants you to buy 12.4 quarts of their fluid to change out 6.73 quarts in your 7.6 quart capacity system .
Hurray for all the Honda Parts Department .
Personally , I don't like to throw 5.67 quarts of perfectly good ATF into a recycling tank - esp since the AT in this case still has almost 1/8 of its capacity made up of 60k old and very nasty fluid in it , but , hey , maybe you are OK with that - its up to the individual .
Worth noting ,It doesn't matter if you do their method at 30k or 60k or whatever - you still end up wasting 5.67quarts of fluid per Honda "change" ie 45.73% is disposed of early - or at best , used as a very expensive and very weak flush .
This means in terms of dollars , you throw away 5.67 x (4-9.00)$ or somewhere between 22.68-51.08$ plus tax - which some use to put towards a correctly done forward flush .
If you are using the higher cost fluids and have a shop that will work with you the total cost comes out the same - w/o you doing the work .
There is a better , simpler , and most times cheaper/less time consuming way to maintain your fluid than either of the above - its basically what some Honda AT owners have been doing since Honda has offered an automatic .
Its also what Honda used to recommend for severe service on many of their ATs .
Lets back up a minute .
Part of why this factory method is so inefficient is (do the math) you are
not changing out 50% of your fluid per partial drain , the correct number for your installation is
41-42% - which makes a large difference after 4 partial drain and fills .
Most Honda ATs regardless of year or model are in this range with the rest somewhere between 40-45% .
You posted that on other forums Honda owners are doing too much changing by using a 15k interval - this is incorrect x2 - the vast majority of Honda owners when they use 15k in their AT maintenance schedule are doing a
single partial drain and fill not four in a row so they use exactly the same amount of fluid every 60k - the difference is they don't waste 45/46 % of their fluid purchases and they make a
no cost , high value improvement in their AT fluid quality over the life of the vehicle by doing so .
They are metaphorically , buying 100$ bills for 20 bucks and unlike some , know the value of that .
( Obviously , both methods have the same fluid quality between 0-15k) .
Qualitatively , by doing a simple , single partial drain at 15k vs the Honda prescribed 4x3.1Q "change" they have much better fluid quality between 15k thru 60k and slightly less fluid quality during the 60-75k interval .
At 75k they pull ahead again , as the comparative cycle repeats itself .
If you have decided that a 30k
"change" is what you want you can get the same improvements and advantages doing a single drop and fill every 7.5k .
You
might be able to substitute a single drop and fill at 10-15k and save some money .
When Honda says "change" the fluid on your transmission they mean 3.1Qx4 ,
not 3.1Qx1 .
One of the other benefits to the frequent partial drain method is that your Honda provided filter , which is a PIA to change , will have a longer service life .
My apologies in advance to all those who sell ATF for a living and need to do increase volume this way .