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dual auto oil filters for transmission #4643345
01/22/18 08:44 PM
01/22/18 08:44 PM
Joined: Jul 2014
Posts: 389
Ceciltucky Maryland
Oldtom Offline OP
Oldtom  Offline OP

Joined: Jul 2014
Posts: 389
Ceciltucky Maryland
I plan to connect a 3/4 -16 spin on filter mount to my Dodge Caravan trans cooler line. I am wondering if a dual filter mount would offer any advantage such as lower pressure drop and more dirt capacity? I know a lot of folks run any old single oil filter with no apparent ill effects, but, I tend to worry about the worst case scenario such as the filter clogging up and killing the trans.

What say you wise ones? hopelessly paranoid or do dual filters have any merit :-)

Thanks in advance for any advice?

Last edited by Oldtom; 01/22/18 08:45 PM.
Re: dual auto oil filters for transmission [Re: Oldtom] #4643352
01/22/18 08:50 PM
01/22/18 08:50 PM
Joined: Dec 2016
Posts: 7,991
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 7,991
Waco, TX
Originally Posted By: Oldtom
I plan to connect a 3/4 -16 spin on filter mount to my Dodge Caravan trans cooler line. I am wondering if a dual filter mount would offer any advantage


NONE - except your wallet will be lighter

A single filter (PH-8A or FL-1A size) will flow about 5X more than your trans will ever push through it.

Originally Posted By: Oldtom
What say you wise ones? hopelessly paranoid?


Yes, obviously


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: dual auto oil filters for transmission [Re: Oldtom] #4643354
01/22/18 08:51 PM
01/22/18 08:51 PM
Joined: Dec 2016
Posts: 7,991
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 7,991
Waco, TX
Originally Posted By: Oldtom
but, I tend to worry about the worst case scenario such as the filter clogging up and killing the trans.


This will NEVER EVER EVER EVER EVER EVER EVER happen. Ever.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: dual auto oil filters for transmission [Re: Oldtom] #4643360
01/22/18 08:55 PM
01/22/18 08:55 PM
Joined: Dec 2016
Posts: 7,991
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 7,991
Waco, TX
https://bobistheoilguy.com/forums/ubbthreads.php/ubb/showflat/Number/4616296

AGAIN.....

Originally Posted By: Oldtom

I was thinking about hooking an automotive oil filter into the trans cooler line and changing it twice yearly. I already have a trans cooler as " insurance" when towing in hill country. Would a Fram Ultra or Toughgard work for ths duty? Annual mileage is 6000 miles with 700 miles towing the trailer. Money is tight and I am trying to make this tow vehicle last as long as possible.


Yes, one filter will be fine. For the life of the vehicle.
If you put 6,000 miles a year on this thing, you could drive it for 20 YEARS!!!
and the one filter would STILL be fine!!

Trust me.
Drive the minivan until it is 100% dead,
then cut the filter open -
you will find hardly anything in it.

Changing the oil filter every six months is so necessary, it would be borderline mental issue.

Last edited by Linctex; 01/22/18 08:57 PM.

"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: dual auto oil filters for transmission [Re: Oldtom] #4643376
01/22/18 09:09 PM
01/22/18 09:09 PM
Joined: Aug 2008
Posts: 3,455
Where the wind comes sweepin'
Reddy45 Online shocked
Reddy45  Online Shocked

Joined: Aug 2008
Posts: 3,455
Where the wind comes sweepin'
For context, this is the spin on trans filter on an Allison trans on a GM 3/4 ton truck. Tiny little thing but it still works. Your Caravan will be fine with 1 filter.


Re: dual auto oil filters for transmission [Re: Oldtom] #4643378
01/22/18 09:11 PM
01/22/18 09:11 PM
Joined: Jul 2014
Posts: 389
Ceciltucky Maryland
Oldtom Offline OP
Oldtom  Offline OP

Joined: Jul 2014
Posts: 389
Ceciltucky Maryland
Thanks for the confirmation Linctex. I tend to worry too much about the worst case scenario when, statistically, it will probably never happen.


Free psychological counseling is one of the many benefits of BITOG :-)

Re: dual auto oil filters for transmission [Re: Oldtom] #4643636
01/23/18 06:35 AM
01/23/18 06:35 AM
Joined: Nov 2008
Posts: 3,517
Oshawa, Ontario Canada
JC1 Offline
JC1  Offline

Joined: Nov 2008
Posts: 3,517
Oshawa, Ontario Canada
Originally Posted By: Oldtom
I plan to connect a 3/4 -16 spin on filter mount to my Dodge Caravan trans cooler line. I am wondering if a dual filter mount would offer any advantage such as lower pressure drop and more dirt capacity? I know a lot of folks run any old single oil filter with no apparent ill effects, but, I tend to worry about the worst case scenario such as the filter clogging up and killing the trans.

What say you wise ones? hopelessly paranoid or do dual filters have any merit :-)

Thanks in advanceq for any advice?


What year is the caravan and what setup are you going with? One filter should be fine. I used a magnefine on my old Sienna before.


2015 Grand Caravan SXT Plus 5w-20 Valvoline SynPower/Fram Ultra Filter
1997 Honda Civic CX 5w-30 PPPP/Fram Ultra Filter
Re: dual auto oil filters for transmission [Re: Oldtom] #4643743
01/23/18 08:59 AM
01/23/18 08:59 AM
Joined: Sep 2012
Posts: 2,221
London, England
bigjl Offline
bigjl  Offline

Joined: Sep 2012
Posts: 2,221
London, England
My 04 Legacy had an external spin on filter for the autobox.

Was not far from the engine oil filter, they were the same size and (at the time) both Black

If memory serves they were labelled so you didn't mix them up.

Not sure if they changed the gearbox filters to blue when they updated the oil filters.


16 S350d LWB 25k Mobil Super 3000 XE 5w30
17 Smart ForFour Auto 6.5k Mobil 1 0w40 FS
Re: dual auto oil filters for transmission [Re: Oldtom] #4643773
01/23/18 09:22 AM
01/23/18 09:22 AM
Joined: May 2012
Posts: 2,442
The land of USA-made Subies!
SubieRubyRoo Offline
SubieRubyRoo  Offline

Joined: May 2012
Posts: 2,442
The land of USA-made Subies!
Bigjl, here in the 'States the Subies used the exact same filter on both trans and oil... kinda made it easy to remember and good if there were sales! smile

Re: dual auto oil filters for transmission [Re: Oldtom] #4643829
01/23/18 10:03 AM
01/23/18 10:03 AM
Joined: Aug 2004
Posts: 1,429
VA
Rhymingmechanic Offline
Rhymingmechanic  Offline

Joined: Aug 2004
Posts: 1,429
VA
I think you would have to kill the trans in order to clog the filter.

I have opened three or four Magnefine filters, with an element about the size of a fuel filter, and never found anything in the pleats but a shiny flake or two. The magnet is always coated with metal paste, but that's it. I did add the first Magnefine after an early pan drop and filter change, so the trans was pretty clean to start with.

Re: dual auto oil filters for transmission [Re: Oldtom] #4655118
02/03/18 06:31 PM
02/03/18 06:31 PM
Joined: Dec 2006
Posts: 568
ohio
xtell Offline
xtell  Offline

Joined: Dec 2006
Posts: 568
ohio
All the automatic transmissions and power steering units on my work trucks and personal vehicles run a in-line 3/4-16 oil filter sized mount. In the past, I put AcDelco, Purolator or Wix filters on them. As change out time comes up, I'm slowly switching them over to Fram Ultra Synthetic Oil filters. You will not have any issues with restriction of oil flow.

Re: dual auto oil filters for transmission [Re: Oldtom] #4655123
02/03/18 06:41 PM
02/03/18 06:41 PM
Joined: Sep 2010
Posts: 8,167
Texas
4WD Offline
4WD  Offline

Joined: Sep 2010
Posts: 8,167
Texas
That should fit a Fram XG16 (what I run) I added this large magnet



Re: dual auto oil filters for transmission [Re: 4WD] #4655394
02/03/18 11:54 PM
02/03/18 11:54 PM
Joined: Dec 2006
Posts: 568
ohio
xtell Offline
xtell  Offline

Joined: Dec 2006
Posts: 568
ohio
4WD,

That's a nice magnet. A lot better than the salvaged magnets from computer hard drives that I use. When you change your oil, have you unscrewed the Magnafilter to see how much metal it caught?

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