Trans Flush - 220K unsure if ever been done. - Ford Powerstroke Diesel Forum
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Old 12-09-2012, 10:24 AM
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Trans Flush - 220K unsure if ever been done.

So I have no idea if this has ever been done on my truck.

There is two schools of thought on this one, some people say leave it alone it works and well the others say nuts to that flush and clean it.

What would you guys suggest as a process for doing a flush on the trans if you don't know when it was done last?

Should I flush it, new fluid, drain new fluid filter it, repeat, then put in new fluid when all done? What do you guys suggest to keep from getting particulates stuck in places they dont belong?
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Old 12-09-2012, 10:36 AM
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In my opinion I would change it I had the same question when I bought mine so I change the fluid and filters filters was ford and amsoil was the fluid I use and not had any problems but this is my opinion others will chime in with advice
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Old 12-09-2012, 10:38 AM
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how many unknown miles did you have, did you use any "cleaner" productS?
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Old 12-09-2012, 10:42 AM
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The trans holds about 18 quarts if I remember correctly.

Changing the external filter and dropping the pan to change the internal filter and to clean the magnet will be about 8 quarts.

I suggest doing that at the least.


This way you can remove contaminants from the transmission with filters and magnet.


I have never seen of read that changing all of the fluid is bad. Only old here say stories.
This is a modern transmission with modern fluid.



If it were me I would do what I have been doing. Look at my link. I use air pressure to push extra fluid out to get about 14 quarts out.
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Old 12-09-2012, 10:44 AM
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With that many miles I would not do anything. If you are determined to do something do a drain and fill but not a flush. I flushed the trans fluid in my 99 with 130k on it and literally not 5 days later I was putting a new valve body in it.
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Old 12-09-2012, 10:45 AM
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Quote:
Originally Posted by ejg3855 View Post
how many unknown miles did you have, did you use any "cleaner" productS?
I had about 138k and I didn't use any cleaners just change it and filters
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Old 12-09-2012, 01:34 PM
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Maybe I will start with just replacing the inline filter for a few weeks.

Then do the drain and fill replacing both filters.
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Old 12-09-2012, 01:38 PM
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Could a shop like AAmco do a flush and get all the particulates out?

Special tools I don't know of?

http://www.aamco.com/Transmission_Fl...ce-service.asp
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Old 12-09-2012, 02:07 PM
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My truck has 89,000 miles on it and I've had the transmission flushed once prior to a long heavy haul from NC to AK. I installed the external filter on the frame rail on the forward passenger side. It shifted great after it was done, although the fluid in it before I flushed it wasn't bad...Either way you can't go wrong.
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Old 12-09-2012, 02:09 PM
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Quote:
Originally Posted by ejg3855 View Post
Could a shop like AAmco do a flush and get all the particulates out?

Special tools I don't know of?

AAMCO - Power PurgeĻ and Maintenance Services
If you flush it needs to be with a machine that heats the fluid to no less than 170 degrees. Otherwise the thermostat in the trans will not open and you will be left with a lot of old fluid. IMO I would not trust any other shop to do it than Ford after you verify they have the means to properly flush the trans. I'd start with a drain and fill on yours and see how that goes and then I'd probably get it flushed at a later date.
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