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Transmission fluid is still black after changing fluid

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Bdoom2
User

Jan 23, 2021, 9:16 AM

Post #1 of 5 (1898 views)
Transmission fluid is still black after changing fluid Sign In
Hi! I’ve got a 2004 Ford F-150 with the 5.4L. The fluid was black before changing it and had a bad smell. I changed it last night as well as the filter and pan gasket, took it out for a drive and checked the dipstick this morning. The fluid level is okay, but the fluid is the exact same color of black as it was before. I’m thinking that I should do a fluid flush... but my dad has read from Quora (seriously?!?!) that I should just leave it... but I’m not buying it. What is your opinion?


Tom Greenleaf
Ultimate Carjunky / Moderator
Tom Greenleaf profile image

Jan 23, 2021, 11:14 AM

Post #2 of 5 (1893 views)
Re: Transmission fluid is still black after changing fluid Sign In
Site has a trans specialist will be by for a final reason. I'll bother to say you didn't change it all, maybe 1/3rd so what did you expect? Black with odor for ATF is never a good thing but you already knew that I hope,


T



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Jan 23, 2021, 11:57 AM

Post #3 of 5 (1889 views)
Re: Transmission fluid is still black after changing fluid Sign In
Quote
The fluid level is okay, but the fluid is the exact same color of black as it was before. I’m thinking that I should do a fluid flush..
First, there is no such thing as a flush. All those machines do is replace the exact amount of fluid that the transmission itself pumps out.

I would have agreed with your father to leave it alone. I have seen many a car drive in for a fluid change when the fluid is that bad and not drive back out.

The goal is to do this before it gets that bad.



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gsferraro
Veteran

Jan 23, 2021, 12:08 PM

Post #4 of 5 (1880 views)
Re: Transmission fluid is still black after changing fluid Sign In
Hello,
Trans in the truck should be a 4R70W , Holds about 12 or so quarts, has a pretty big converter, when dropping the pan, your only getting about 5 or so quarts out so it very well may still be dark, may have to swap it out a few times before it looks clean, but if the fluid is dark and the trans is slipping, fluid change will not help. Gary


Bdoom2
User

Jan 25, 2021, 10:52 AM

Post #5 of 5 (1841 views)
Re: Transmission fluid is still black after changing fluid Sign In
I think I'm just going to leave it for now until something happens. The tranny is shifting OK right now, although it always hesitates to shift into reverse but is fine otherwise.





 
 
 






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