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#4676344 - 02/24/18 10:30 AM nice red ATF always good?
NH73 Offline


Registered: 10/31/14
Posts: 699
Loc: Pa, USA
Could there be a reason an ATF is nice and red, but needs replacement?
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#4676353 - 02/24/18 10:43 AM Re: nice red ATF always good? [Re: NH73]
littleant Offline


Registered: 10/10/17
Posts: 388
Loc: Vermont
I would think like engine oil the additives could get used up but still retain the nice red color. Guess the only way to know for certain is with a uoa. Just my opinion.
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#4676364 - 02/24/18 10:53 AM Re: nice red ATF always good? [Re: NH73]
Saul Offline


Registered: 02/18/15
Posts: 97
Loc: New Mexico
Are you referring to Mistubishi/Hyundai SP III or just regular? SP III is a different kind of red, like no other...

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#4676368 - 02/24/18 10:56 AM Re: nice red ATF always good? [Re: NH73]
ZZman Offline


Registered: 03/17/08
Posts: 5775
Loc: Michigan
As a general rule yes. Fluid changes color over time or from excessive heat.
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#4676389 - 02/24/18 11:18 AM Re: nice red ATF always good? [Re: NH73]
Audios Offline


Registered: 11/19/11
Posts: 884
Loc: Lyndhurst NJ
Only if its the wrong color for that transmission, some take clear, mercedes is now blue.
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#4676411 - 02/24/18 11:39 AM Re: nice red ATF always good? [Re: NH73]
NH73 Offline


Registered: 10/31/14
Posts: 699
Loc: Pa, USA
This is in a Ford Explorer Sport Trac where it would be expected to be red. I have about 50,000 miles on the fluid.
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#4676422 - 02/24/18 11:51 AM Re: nice red ATF always good? [Re: NH73]
Joshontech Offline


Registered: 11/10/16
Posts: 10
Loc: Wind Gap PA
If your manual says to change it at 50k miles than I would change it. The thing is most tranny oil filters are the weak point cause the oil has changed but not most filters. Otherwise I would say it would be ok.

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#4676435 - 02/24/18 12:07 PM Re: nice red ATF always good? [Re: Joshontech]
NH73 Offline


Registered: 10/31/14
Posts: 699
Loc: Pa, USA
Agree, but the manual doesn't say change it at 50,000 miles. Its at 150,000 miles till they say change it. Agree that it might too long, so that is why I came to ask.
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#4676462 - 02/24/18 12:25 PM Re: nice red ATF always good? [Re: NH73]
andyd Offline


Registered: 09/25/04
Posts: 7139
Loc: Marshfield , MA
Not all transmissions are equal. Some are much stronger and can run on mud. Fords aren't known for long lived transmissions in general. A 50k drain and fill sounds reasonable to me. ATF is cheap compared to a trans. What does the fluid smell like?
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#4676483 - 02/24/18 12:47 PM Re: nice red ATF always good? [Re: ZZman]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: ZZman
As a general rule yes. Fluid changes color over time or from excessive heat.


Yes.

Excessive Heat is ALWAYS ALWAYS ALWAYS the #1 killer of auto trans.

Nice & bright red = never been hot enough to change color.
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(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4676488 - 02/24/18 12:49 PM Re: nice red ATF always good? [Re: Joshontech]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: Joshontech
The thing is most tranny oil filters are the weak point cause the oil has changed but not most filters.


This really isn't true at all.

Most trans filters are simply "rock catchers".
Most won't filter below 100 microns, and many are FAR worse than that.

A GOOD condition trans will NEVER plug its filter.

If you find a plugged filter, it's because the dying trans plugged it...
......... NOT the "other way around"
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(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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#4676491 - 02/24/18 12:52 PM Re: nice red ATF always good? [Re: andyd]
Kira Offline


Registered: 08/19/10
Posts: 5214
Loc: Champlain/Hudson Valley
OK, I realize the 50,000 mile number is key to this thread but really, how can you omit the vehicle's year? Just askin'.

50K is 50K. Change your juice.

Did a father & son duo of Ford trannie D&F's at 56K and 52K; '97 F-150 and '04 Explorer respectively.

MerconV in both. Both their fluids were a bit darkened with dirt but was still red and didn't smell. Nothing changed except for the knowledge gained.

And thanks to Ford for removing the dipstick on the Explorer's V6.

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#4676494 - 02/24/18 12:53 PM Re: nice red ATF always good? [Re: Linctex]
4WD Offline


Registered: 09/21/10
Posts: 6366
Loc: Texas
Originally Posted By: Linctex
Originally Posted By: Joshontech
The thing is most tranny oil filters are the weak point cause the oil has changed but not most filters.


This really isn't true at all.

Most trans filters are simply "rock catchers".
Most won't filter below 100 microns, and many are FAR worse than that.

A GOOD condition trans will NEVER plug its filter.

If you find a plugged filter, it's because the dying trans plugged it...
......... NOT the "other way around"


For this reason I change my external (20 micron) yearly and the pan filter every 3 years the pan was so clean last time I could go longer

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#4676550 - 02/24/18 01:57 PM Re: nice red ATF always good? [Re: NH73]
Snagglefoot Offline


Registered: 12/31/17
Posts: 1707
Loc: Alberta
popcorn popcorn2

Rule of thumb for the BITOG members: Three times more often than the manufacturer says.

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#4676564 - 02/24/18 02:10 PM Re: nice red ATF always good? [Re: Snagglefoot]
simple_gifts Offline


Registered: 07/26/04
Posts: 11944
Loc: Middlesex County CT
Originally Posted By: Snagglefoot
popcorn popcorn2

Rule of thumb for the BITOG members: Three times more often than the manufacturer says.


What is 3 times more often than never?
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