Transmisson flush after questions
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Elder User
Joined: Jul 2005
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From: Berthoud, CO
Transmisson flush after questions
Just flushed the tranny by draining the pan, then taking the cooler line off the rear of tranny, running engine, pumping it all out, and refill.
Now a couple of questions....only took like 9 quarts of oil to refill. Seems like it should be more.
Second question, oil still looks dirty.
Where was the remaining oil when I flushed. I thought that when you pulled the cooler line off the back of the tranny and used the pump it pumped it all out? When I shut the engine off, there wasnt any oil left coming out of the hose from the tranny. The only thing I didnt do, didnt think of it at the time, was shift between gears while draining the oil.
Any ideas?
Now a couple of questions....only took like 9 quarts of oil to refill. Seems like it should be more.
Second question, oil still looks dirty.
Where was the remaining oil when I flushed. I thought that when you pulled the cooler line off the back of the tranny and used the pump it pumped it all out? When I shut the engine off, there wasnt any oil left coming out of the hose from the tranny. The only thing I didnt do, didnt think of it at the time, was shift between gears while draining the oil.
Any ideas?
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,725
Likes: 2,651
From: SE Florida
Here's how you do it:
Changing ATF Fluid in a E4OD and 4R100 transmission .: Articles
If you follow ALL of the steps it will get all the fluid changed. You only did a few of the steps. Now that you have old and new fluid mixed I recommend you buy 20 quarts of MERCON V (the procedure needs updating for that) and start over.
Changing ATF Fluid in a E4OD and 4R100 transmission .: Articles
If you follow ALL of the steps it will get all the fluid changed. You only did a few of the steps. Now that you have old and new fluid mixed I recommend you buy 20 quarts of MERCON V (the procedure needs updating for that) and start over.
Cargo Master
Joined: Jun 2003
Posts: 3,292
Likes: 6
From: Ardenvoir, Washington
Interesting... according to the above "how to" it says to remove the line off the back of the trans & run the engine to remove the oil from the TC. maybe you did not run the engine long enough.. Did you run the engine after filling the trans with the 9 quarts?? You must do this inorder to refill the TC.
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Elder User
Joined: Jul 2005
Posts: 659
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From: Berthoud, CO
Thanks Mark for the link. I'll redo the flush tomorrow! I added a tranny filter while I was doing the first flush, better swap that too.
Hopefully the transmission still shifts when all this is over, Ive heard stories that when you flush, sometimes the tranny goes out shortly after....
Hopefully the transmission still shifts when all this is over, Ive heard stories that when you flush, sometimes the tranny goes out shortly after....
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,725
Likes: 2,651
From: SE Florida
If the trans dies after a flush either it was severely damaged before the flush, or the flush was done improperly and damaged it. If it's done right a good trans will only be helped, not hurt.
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From: Ky
not to hyjack this thread,but ive always heard that you shouldnt flush a tranny over 50,000 miles thats never had it done before.I was told not to do this because atf is a detergent and the new fluid will pick up all the stuff that never made it to the filter and will cause problems and make the tranny slip.im just wondering if this is correct.
If you ran the engine long enough the pan should only have a very small amount of fluid in it. And if you only ran it once you didn't even come close to changing all of the fluid.
If the trans dies after a flush either it was severely damaged before the flush, or the flush was done improperly and damaged it. If it's done right a good trans will only be helped, not hurt.
If the trans dies after a flush either it was severely damaged before the flush, or the flush was done improperly and damaged it. If it's done right a good trans will only be helped, not hurt.
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Temporarily Deactivated
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From: Ky
im not saying i dont trust him,i was asking if that was true or not, its just some ive always heard from the old timers.
Post Fiend
Joined: May 2009
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From: Pea Ridge, AR
I think any time this debate comes up you always have the same responses. Either you should never touch the transmission, or you should regularly flush and fill. No matter what vehicle you are talking about you will have both responses come up. I am of the belief that it is similar to changing your oil, lets say for instance you bought your truck used, not really knowing the previous maintenance intervals, such is the case with transmission service. Anyway without knowing for sure, would you simple drain about 1/2 the oil, change the filter and top it off, because you wouldn't want to "break loose" any of the sludge the rest of the oil is holding onto? My point maybe the best way for the first time is to drain and remove pan, inspect filter, if no large chunks or severely burned oil are present go ahead and flush it. If chunks or burned fluid are then you're close to a rebuild anyway, so maybe you can gain a little extra time by simply installing new filter and 1/2 the new fluid, skipping the flush and cross your fingers for the best, just my humble opinion.
FTE-Spread The Knowledge
Joined: Feb 2008
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With all due respect, a transmission that has been stressed by improper maintenance (one that didn't have regular 30k mile ATF changes), would have multiple variables of wear that would be impossible to calculate. Thus, a conclusion to the cause of the failure could not be accurately predicted.
Post Fiend
Joined: May 2009
Posts: 5,470
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From: Pea Ridge, AR
I agree just bringing up the point it is always a HOT topic. And to your point would you flush this inaccurate prediction or leave the trans alone? Like I said if you know the maintenance intervals its an easy call but if unknown I believe you will have people from both camps offer their opinions. Which is more accurate I honestly don't know? Just offering my opinion.
Frmr Ford Trans Engr
Joined: Aug 1999
Posts: 24,725
Likes: 2,651
From: SE Florida
There is some truth, but not much, to the claims that flushing an older trans will kill it. Here's how I think it happens.
Someone ignores their transmission until it has A LOT of miles, and then it starts having problems. The first thing they try is changing the fluid. The problem is that they ignored it until it had major damage. The new fluid couldn't fix the damaged trans, and then it dies. If they hadn't changed the fluid it would also have died, but they don't know it.
New fluid is ALWAYS better. Sometimes it's too late, but the new fluid did NOT cause the failure. Neglect did.
Someone ignores their transmission until it has A LOT of miles, and then it starts having problems. The first thing they try is changing the fluid. The problem is that they ignored it until it had major damage. The new fluid couldn't fix the damaged trans, and then it dies. If they hadn't changed the fluid it would also have died, but they don't know it.
New fluid is ALWAYS better. Sometimes it's too late, but the new fluid did NOT cause the failure. Neglect did.
Thread Starter
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Elder User
Joined: Jul 2005
Posts: 659
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From: Berthoud, CO
Just flushed the tranny again the right way, wow, there was a lot of bad oil still left in there. Oil on the stick is nice and red again. Thanks all of you who helped me on this, repped as many of you as I could.