Trans flush - the dealership said do not do it. - Page 2 - Ford Powerstroke Diesel Forum
General 6.7 Discussion (2011-2016) General 6.7 Discussion

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post #11 of 36 Old 12-07-2018, 05:51 PM
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Originally Posted by Old King Coal View Post
Shows how much he knows. The first service interval in the owners manual is 150k.

Wasn't his call. I wanted it done. Didn't care about the service interval.

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post #12 of 36 Old 12-07-2018, 06:09 PM
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smart move IMO

both my kids have sealed for life transmission ( Lexus/Toyota) u bet i didn't wait for "life" to change the fluid and filters lol

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Last edited by ZMANN; 06-04-2019 at 12:28 AM. Reason: 9=(
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post #13 of 36 Old 12-21-2018, 05:17 PM
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Why dont you drop the pan and replace the 9 quarts that come out with new fluid. You would then be at half and half with new and old fluid
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post #14 of 36 Old 06-03-2019, 08:49 PM Thread Starter
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Originally Posted by JustinOOO9 View Post
More often than not changing all the fluid via a special machine or just multiple drain and refills on a high mileage unit exposed issues and just caused customers to blame a failing unit on the person/organization that changed the fluid



It could just be personal experience but the dealer is just trying to be cautious. I would never in a million years drain all the old fluid out of a trans with 281k. its a ticking time bomb at that point and im wagering if he moves through with a complete fluid exchange he will have issues sooner than later.


[COLOR="Black"][/See my words in red. Its a general rule of thumb hat saved MANY folks from replacing the transmission or rebuilding when dealing with high mile units. You and other may not like or agree with the mindset but again im coming from personal experience and there are always exceptions to generalities but I would highly discourage the complete fluid exchange of high mileage units unless you have the coin/time for a new/rebuilt unit soon enough. But if you are a gambling man I say go for the flush, heated fluid exchange, vacuum whatever they use and keep us updated, just don't be mad or surprised if you experience issues soon. COLOR]
I realized I never gave you guys an update on this!

So I have put about 25k miles on the truck since the flush - probably only 500ish miles of towing (featherlite 17.5" with 4-6klbs vehicles) - so far so good. I have not noticed any performance issues with the transmission or any shifting abnormalities.

The Ford dealer used the factory hot flush method - I took a peek at their machine. They do it quite regularly for the handful of customer who keep to factory service intervals using this shop. I don't believe they actually used a chemical agent but I could be wrong.
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post #15 of 36 Old 06-04-2019, 12:29 AM
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Thanks for the update
I also doubt they used a chemical

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post #16 of 36 Old 06-04-2019, 07:10 AM
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The method I have always used on auto transmissions is to do 2 or 3 drain and refills, driving 100 miles or so in between. It's never caused me a problem.
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post #17 of 36 Old 06-04-2019, 07:55 AM
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So not to "thread hijack" here, but would you guys fill and flush on 169k miles before a long tow?

I am moving in July. I will be towing a car trailer with my VW on it. Probably 5k lbs of weight, maybe? The trailer is probably heavier then my 69 T3...
I bought the truck with 164k, but don't know if/when the tranny was ever flushed, etc.

Should I do that anyway, considering the mileage? It drives great. No shifting issues at all. Temps run around 192 to 197 degress just cruising up and down the highway to work.

When it comes to mechanics, everything I know is from either breaking it or watching someone else do the same. Then I had to fix it....Is that bad?

Murphy's Law: "things will go wrong in any given situation, if you give them a chance."
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post #18 of 36 Old 06-04-2019, 08:09 AM
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I wouldn't hesitate to do it, stock interval is 150k anyways, so even if it's never been done, you're only 19k behind schedule.

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post #19 of 36 Old 06-04-2019, 02:34 PM
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Just saw a video from the Ford Tech Makuloco this morning and he just drained, cleaned the pan, changed the filter and refilled at 60K. After reading this thread and watching the video, I need to check my service manual as I am at severe duty 61,000.

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post #20 of 36 Old 06-04-2019, 04:41 PM
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He has a 6.7 video out also ?
I have only seen the 6.0 stuff from him

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