Stacking Tranny coolers???
Posting Guru
Joined: Feb 2007
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From: Bradenton FL
My stock gauge comes up about 1/3 and stays there i havent hauled anything in the Florida august heat yet but i would be curious to know what the guys at BTS say about adding coolers/types and placement locations.
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I wouldn't rely on a stock guage. I've no experience with factory tranny guages but I was told by a Ford mech once that the oil press guage would show normal until it got to some way low number like 14 psi or something crazy. Reason it came up was a dispute over a puked motor I was trying to get warrantied. I actually won. Forgot to mention the top of headlight mudhole. 
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Originally Posted by clux
From what I've read, stacking stock coolers is not recommended, it can result in too high/low pressure, that's why the 6.0 cooler is so popular. Low pressure drop aftermarket coolers are ok to stack with the stock cooler, though.
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Post Fiend
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From: Millbrook Alabama
Originally Posted by John311t
I also heard this. You may want to try it and see what the difference in flow is before and after.
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Post Fiend
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From: Millbrook Alabama
Originally Posted by Izzy351
Why not split the flow and run them in parallel instead of series? The restriction would be halved instead of doubled and the end result is the same...
that is just what my simple brain thinks, but anyone out there who knows about flow rates and hydrological flow restrictions speak up.
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Joined: Oct 2006
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From: San Antonio, Texas
I had the stacked coolers when I had My BTS installed. Brian Suggested removing all and installing the 6.0 Cooler. he warrantys his trannys basicly for life. So he must know the outcome.
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From: I'm there!
Originally Posted by Benny2002
My stock gauge comes up about 1/3 and stays there i havent hauled anything in the Florida august heat yet but i would be curious to know what the guys at BTS say about adding coolers/types and placement locations.
My .02
Post Fiend
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From: Dallas-Ft. Worth
He's already said he got the second stock cooler for nothing, so that's the reason he's trying to do this. I wouldn't worry about the tees being much of a restriction. The overall effect of halving the flow through the two of them in parallel will more than make up for the minor difference in the tees, IMHO.
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From: Rio Rico, AZ.
I didn't take the time to read this whole thread, but I did read enough to see the part about running them in series. I would never do that. If I was going to have multiple ATF coolers, I would tee them and run them parallel instead of series.
In addition I would put a large oriface in both/all of them that if you add up the cross section of all the orifaces and total them together it would be the same volume as one cooler.
Follow me so far? The total flow of all the orifaces at, for instance, 20 psi would equal the same amout of flow through the one ATF cooler. Except that the flow is balanced out through both coolers by the restriction provided by the oriface.
I'm not talking about a pinhole here, something along the lines of 3/16".
That way all the fluid would slow down as it passes through the coolers and get a chance to really cool off before returning to the transmission.
It would be a lot easier to just get a 6.0 cooler and be done with it.
In addition I would put a large oriface in both/all of them that if you add up the cross section of all the orifaces and total them together it would be the same volume as one cooler.
Follow me so far? The total flow of all the orifaces at, for instance, 20 psi would equal the same amout of flow through the one ATF cooler. Except that the flow is balanced out through both coolers by the restriction provided by the oriface.
I'm not talking about a pinhole here, something along the lines of 3/16".
That way all the fluid would slow down as it passes through the coolers and get a chance to really cool off before returning to the transmission.
It would be a lot easier to just get a 6.0 cooler and be done with it.
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From: Carhenge
Originally Posted by Kwikkordead
I didn't take the time to read this whole thread, but I did read enough to see the part about running them in series. I would never do that. If I was going to have multiple ATF coolers, I would tee them and run them parallel instead of series.
In addition I would put a large oriface in both/all of them that if you add up the cross section of all the orifaces and total them together it would be the same volume as one cooler.
Follow me so far? The total flow of all the orifaces at, for instance, 20 psi would equal the same amout of flow through the one ATF cooler. Except that the flow is balanced out through both coolers by the restriction provided by the oriface.
I'm not talking about a pinhole here, something along the lines of 3/16".
That way all the fluid would slow down as it passes through the coolers and get a chance to really cool off before returning to the transmission.
In addition I would put a large oriface in both/all of them that if you add up the cross section of all the orifaces and total them together it would be the same volume as one cooler.
Follow me so far? The total flow of all the orifaces at, for instance, 20 psi would equal the same amout of flow through the one ATF cooler. Except that the flow is balanced out through both coolers by the restriction provided by the oriface.
I'm not talking about a pinhole here, something along the lines of 3/16".
That way all the fluid would slow down as it passes through the coolers and get a chance to really cool off before returning to the transmission.
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From: Bryson City NC
Last fall I bought a 30ft Fiver rv and after reading about all the tranny troubles some of the folks had been having and the heat problems I picked up a 24000 lb stacked plate Teckonsha Defender trans cooler. This was mounted to the front of the AC condenser then plumbed in series with the OEM cooler. I bought a digital temp gage that goes in the test port. Took a trip this winter to FL and I never saw 170 degrees the whole trip even climbing the hills here in NC ! I think it will keep some life in the old girl for awhile!
Smokie
http://i24.photobucket.com/albums/c19/Smokiesman/DSCF0543.jpg
Smokie
http://i24.photobucket.com/albums/c19/Smokiesman/DSCF0543.jpg
Last edited by Smokiesman; Apr 13, 2007 at 09:37 PM.
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Post Fiend
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From: Millbrook Alabama
I think, that I will nix this idea. I have never had cause to worry about my temps, with the mileage that I have pulled my 5er and all the campers I pulled in La. after the huriicanes I have never exceded 200*. by my guage(Isspro now) my temps have never been above 195*. I talked w/ a tranny builder from my buddys race team today and we looked at the possible mounting locations and the closeness of the tubes in the stock cooler and came to the conclusion that I may not gain a whole lot for the work invloved. If you wil look back at the pics of aux tranny coolers that are in this thread you will notice one blazing difference in the stock cooler and the after market coolers the space between the tubes is 3 times the size of the stocker. That= more airflow to cool the fluid, and it doesn't become a heat sink in front of the A/C cooler,CAC cooler and radiator.
does this logic make sense to yall too?
does this logic make sense to yall too?