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#4451609 - 07/06/17 06:26 PM 6L80
JeePing Offline


Registered: 08/10/06
Posts: 114
Loc: Kentucky
Any one installed an external oil filter in one of those transmissions? Dropped the pan on my 2015 sierra with only 35k miles had a nice coat of metal glitter built up all on the inside, magnet was pretty loaded as well. Nothing out of the ordinary, but still, makes one wonder if an external filter would be a good addition. Plenty of room to plumb one some place just not sure if tapping into a cooler line is a good idea.
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#4451614 - 07/06/17 06:33 PM Re: 6L80 [Re: JeePing]
CT8 Offline


Registered: 10/09/14
Posts: 10979
Loc: Idaho
Is this the first oil change
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#4451623 - 07/06/17 06:38 PM Re: 6L80 [Re: JeePing]
JeePing Offline


Registered: 08/10/06
Posts: 114
Loc: Kentucky
Yep
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#4451625 - 07/06/17 06:39 PM Re: 6L80 [Re: JeePing]
Jimzz Offline


Registered: 10/03/14
Posts: 1145
Loc: NoVA
First change will have more material due to breaking in. An external transmission cooler, or larger one, would add more life than a external filter.
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#4451628 - 07/06/17 06:43 PM Re: 6L80 [Re: JeePing]
JeePing Offline


Registered: 08/10/06
Posts: 114
Loc: Kentucky
Jim I would have to respectfully disagree, factory cooler is an excellent heat exchanger. External unit will add no benefit.
_________________________
If it an't broke, take it a part and see why not.

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#4451641 - 07/06/17 07:01 PM Re: 6L80 [Re: JeePing]
userfriendly Offline


Registered: 06/03/03
Posts: 2630
Loc: LaFinDuMonde
How is the material on the bottom of the pan going to get to the remote filter without being trapped in the internal filter?
I think the solution, if there is a problem, is to install a drain plug on the bottom of the oil pan.

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#4451649 - 07/06/17 07:17 PM Re: 6L80 [Re: userfriendly]
JeePing Offline


Registered: 08/10/06
Posts: 114
Loc: Kentucky
Originally Posted By: userfriendly
How is the material on the bottom of the pan going to get to the remote filter without being trapped in the internal filter?
I think the solution, if there is a problem, is to install a drain plug on the bottom of the oil pan.


Its the materiel that internal filter isn't catching that I'm trying to filter out.
_________________________
If it an't broke, take it a part and see why not.

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#4451811 - 07/06/17 09:55 PM Re: 6L80 [Re: JeePing]
i_hate_autofraud Offline


Registered: 05/19/16
Posts: 705
Loc: Canada


If there's clearance in the pan I'd add extra magnets, filters can't catch the small stuff, and getting
metal particles out of the oil helps prevent wear, sticking and other damage in the tight clearances
of the valve body.

GM already admitted they used crummy magnets in a whole slew of trannies, search "4T65E magnet" there's a
GM TSB that covers several GM models.....

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#4451892 - 07/06/17 11:25 PM Re: 6L80 [Re: JeePing]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: JeePing

Its the materiel that internal filter isn't catching that I'm trying to filter out.


The factory in pan filter is maybe 100 microns at best. It's pretty coarse.

I added a 10 micron inline spin on WIX filter from my spare "hydraulic log splitter parts stash". If you need a filter & filter head, I'll sell you one cheap.
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#4451949 - 07/07/17 01:58 AM Re: 6L80 [Re: JeePing]
901Memphis Offline


Registered: 08/14/10
Posts: 12893
Loc: Northern Kentucky
As long as the the new filter doesn't add any leaks the extra filtration is only a positive especially if you using some very efficient like a Fram Ultra which can hit 80% @ 5 microns, much better than the internal felt fitler
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2002 Buick Century 130k - Built 4T65e(Maxlife) - Edge 0w40 + Fram XG3980

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#4452026 - 07/07/17 06:43 AM Re: 6L80 [Re: JeePing]
JeePing Offline


Registered: 08/10/06
Posts: 114
Loc: Kentucky
Ok at this point does any one know or have a fluid flow diagram of this trans? Adding a ~15 psi restriction inline with the cooler will have any adverse effect on how transmission operate?


Linctex, what transmission you installed your filter on?
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If it an't broke, take it a part and see why not.

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#4452029 - 07/07/17 06:51 AM Re: 6L80 [Re: JeePing]
userfriendly Offline


Registered: 06/03/03
Posts: 2630
Loc: LaFinDuMonde
How much pressure do you have now in your cooler lines?

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#4452034 - 07/07/17 06:55 AM Re: 6L80 [Re: userfriendly]
JeePing Offline


Registered: 08/10/06
Posts: 114
Loc: Kentucky
Originally Posted By: userfriendly
How much pressure do you have now in your cooler lines?


Don't have a clue, was hoping to get lucky and someone with knowledge of this trans would give me an answer. Doesn't look like it, have to go digging on google.

I don't know if that fluid is used to operate the trans/perform other functions with in it, or it just simply dumps back in the sump.


Edited by JeePing (07/07/17 06:56 AM)
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#4452180 - 07/07/17 09:57 AM Re: 6L80 [Re: JeePing]
userfriendly Offline


Registered: 06/03/03
Posts: 2630
Loc: LaFinDuMonde
The filter may reduce flow to the cooler, will this affect your warranty or cause the transmission to overheat?
We are not talking using 5W30 instead of 0W20 here, this is a visible modification to the vehicle.

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#4452279 - 07/07/17 12:01 PM Re: 6L80 [Re: JeePing]
Linctex Offline


Registered: 12/31/16
Posts: 6148
Loc: Waco, TX
Originally Posted By: JeePing
Adding a ~15 psi restriction inline with the cooler will have any adverse effect on how transmission operate?


Linctex, what transmission you installed your filter on?


Where on earth did you get that info from?!?!?!!?

There is ZERO restriction.
It's the same filter used on a freakin' 16HP log splitter, with like 8-10 gpm flow or something like that!

It's on a 4R75E, but with 3/4 NPT ports it'll flow as well as any big truck/bus trans would need!
_________________________
"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."

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