Tranny cooler

[cgalpha08]

I know at least 1 person has this. Is this a difficult mod requiring a bunch of additional cooling lines or just rerouting the lines threw the tranny cooler?

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[ReconH3]

If you have basic mechanical know how, you can Install it. I bypassed the OEM setup so that I don't get cross contamination if factory radiator fails.


"Ex Umbris Venimus"

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[cgalpha08]

Thanks, what size cooler did you install?

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[ReconH3]

Don't recall off the top of my head, but I should of gotten a bigger one.


"Ex Umbris Venimus"

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[Chook]

I used a Universal Derale 13900 and its probably the biggest you can fit in a H3............. here is a link to an earlier thread where I posted details and photos of the install...........http://www.hummer4x4offroad.com/forum/showthread.php?2554-Transmission-Temp/page2&highlight=cooler

 

[06 H3]

Thanks guys I NEED one as I have had my temps up to 240

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[cgalpha08]

Is there an easy way to tell which lines run to the tranny other than physically climbing under there and following them?

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[Chook]

Is there an easy way to tell which lines run to the tranny other than physically climbing under there and following them?

Not sure if the Alpha is the same but on the RHS of the tranny you will see 2 metal pipes running forward near the exhaust. They run forward and connect in middle at the bottom of the radiator (as shown in the 4th pic on my other thread)

 

[cgalpha08]

Thanks. This is definitely a mod that needs to be done asap.

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[theindian]

Would this upgrade void the powertrain warrenty, Im thinking yes, has anyone had any problems with warrenty on the trans if the radiator trans cooler failed and caused tranny problems, do they consider the rad. and cooler part of the drivetrain?

 

[cgalpha08]

No idea on the warranty. but i did find a couple and want to know what people think.

This is the one that Chook has on his rig, works for him so i may get it.
http://www.summitracing.com/parts/DER-13900/

I also found this one, according to Chooks dimensions it will fit, anyone know if its any good?
http://bmracing.com/?wpsc-product=automatic-transmission-supercooler-13000-btu-rated-11x7-12x34

 

[cgalpha08]

This site also has coolers, anybody know if these are any good?
http://www.jegs.com/c/Transmission-Drivetrain_Transmission-Coolers-Lines-and-Fittings/10535/10002/-1

 

[cgalpha08]

Chook or anyone else who has setup a transmission cooler, did you set it up so that it is in line with the radiator, like another small radiator, or did you set it up so that all of the transmission fluid only runs through the transmission cooler?

 

[ReconH3]

I isolated mine to avoid contamination if OEM radiator fails. It's not as efficient as running both, but avoids tranny damage.


"Ex Umbris Venimus"

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[Chook]

I run mine separately also but rather than cut through the rubber lines to fit the external cooler I bought new connectors. I disconnected the OEM & blanked them that way if the front cooler gets damaged I can undo the connectors and blanks and go back to use the OEM.

 

[cgalpha08]

I run mine separately also but rather than cut through the rubber lines to fit the external cooler I bought new connectors. I disconnected the OEM & blanked them that way if the front cooler gets damaged I can undo the connectors and blanks and go back to use the OEM.

Anyway you could post up more details about it? I looked through the other thread and got the jist of ot.

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[Chook]

Anyway you could post up more details about it? I looked through the other thread and got the jist of ot.

If you look at this image in the background you can see the same connectors but they have blanks on them. If the other cooler fails, I can undo the blanks & use the connectors to re-connect the OEM cooler in the radiator.

 

[4u33er]

Once the car fully warms up my tranny temp seems to be almost a 1:1 to my coolant temp which is around 185f +\-