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Old 04-02-2014, 08:41 PM
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Transmission Cooler?

Hello all. My truck is a 70 c10, weighs right at 3400 pound, 4.11 rear. The 355 makes right around 450 to the crank. Three days after putting it in it blew my turbo 400(tranny dad raced in the 90s, it was its time especially after the period of time it once sat) . I'm going tomorrow to see how much it'll be to rebuild/upgrade it. Its going back together with a tci 3000 stall to match the cam much better then the previous 2200. It currently only has trans cooler through 4 row stock gm bb radiator. Motor never comes close to over heating, never had an issue with it. But should I upgrade trans cooler? If so what kind? I have plenty of room in front of the radiator to mount it. That should not be an issue. Suggestions?

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Old 04-02-2014, 09:33 PM
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B&M supercooler

Ii have one on my 383. Not quite the horsepower you have. I run it in a 73c10. Stacked plate cooler for my th400. Ii live in Arizona. It should do you very well. They are about 130 bucks.
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Old 04-02-2014, 10:26 PM
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Adding a trans cooler is always a good idea. If you are going to route the fluid through the stock cooler in the radiator and an aftermarket cooler make sure you flush the stock cooler and lines before you add the new transmissions, the blown trans can send trash into the lines and cooler.

With a higher than stock stall converter additional cooler is pretty much mandatory, higher stall makes more heat
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Old 04-03-2014, 03:49 AM
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I have a B&M stacked plate cooler. Using a trans cooler is almost mandatory on any vehicle with HP. Running it just through the radiator does not keep it cool enough especially if the stall speed is upped.
Just make sure you get the correct size according to the weight of the vehicle.
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Old 05-13-2014, 08:29 PM
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I would suggest to keep the stock cooler in the circuit. Rout to the aftermarket cooler and then through the cooler in the radiator. Keep them in series.
Here is why,,,, the transmission needs to be kept at operating temp. This is why the OEMs sent the fluid through the engine coolant. You can have the extra thermal capacity and make sure the tranny stays up to temp as the engine thermostat will help this. Cold fluid can harm a tranny as well.
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Old 05-13-2014, 09:07 PM
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Quote:
Originally Posted by compje View Post
I would suggest to keep the stock cooler in the circuit. Rout to the aftermarket cooler and then through the cooler in the radiator. Keep them in series.
Here is why,,,, the transmission needs to be kept at operating temp. This is why the OEMs sent the fluid through the engine coolant. You can have the extra thermal capacity and make sure the tranny stays up to temp as the engine thermostat will help this. Cold fluid can harm a tranny as well.

That is incorrect information.

The proper way is through the radiator cooler then external cooler.

The BS about warming fluid is just that, BS.

In extreme cold the external cooler must be covered. I am talking -40C.

OEM is never sent through external then radiator.
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Old 05-13-2014, 09:53 PM
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transmission cooler installation diagram
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Old 05-14-2014, 02:08 AM
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https://www.google.ca/?gws_rd=cr&ei=...+cooler+images
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Old 05-14-2014, 04:09 AM
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Quote:
Originally Posted by stuarta View Post
That is incorrect information.

The proper way is through the radiator cooler then external cooler.

The BS about warming fluid is just that, BS.

In extreme cold the external cooler must be covered. I am talking -40C.

OEM is never sent through external then radiator.
Correct routing is from trans to auxiliary cooler to radiator,then back to trans.Fluid needs to maintain proper temp.
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Old 05-14-2014, 05:11 AM
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Quote:
Originally Posted by jokerZ71 View Post
Correct routing is from trans to auxiliary cooler to radiator,then back to trans.Fluid needs to maintain proper temp.
This is a common misconception. I placed images up there ^


Automatic transmission cooler guide and installation
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Old 05-14-2014, 06:12 AM
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Quote:
Originally Posted by stuarta View Post
This is a common misconception. I placed images up there ^


Automatic transmission cooler guide and installation
I saw it,but,i disagree.There are just as many reputable links to support the other way as well. Any hydrauilic system & fluid operates best @ a recommended & consistant operating temp.Consistant being very important.Routing fluid thru the auxillary last can cause your temp to vary depending on outside temps.Sometimes quite a bit.Too cool fluid temps can cause excessive wear & noise,leaks,& erratic operation.Most auto trans & fluids work best in the 170* range.If you are overheating a trans routing it like this,you have other issues that need to be addressed.
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Old 05-14-2014, 07:01 AM
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Quote:
Originally Posted by jokerZ71 View Post
I saw it,but,i disagree.There are just as many reputable links to support the other way as well. Any hydrauilic system & fluid operates best @ a recommended & consistant operating temp.Consistant being very important.Routing fluid thru the auxillary last can cause your temp to vary depending on outside temps.Sometimes quite a bit.Too cool fluid temps can cause excessive wear & noise,leaks,& erratic operation.Most auto trans & fluids work best in the 170* range.If you are overheating a trans routing it like this,you have other issues that need to be addressed.
There may be other places that state the other direction but they are wrong. Look at any OEM installation.

I spent more than 50 years rebuilding automatic transmissions.
Hayden transmission coolers were about the first to hit the streets and the method I described was their method from day one and still stands today.
Yes extreme cold weather can cause lots of problems. That is when a bypass or "T" fitting comes into affect.
I live in a very cold climate and recomend covering the cooler during highway travel.
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Old 05-14-2014, 07:27 AM
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BS or NO BS, I think I will stick with the method that gives thermostatic control of the tranny fluid.
If it is BS, what problems would arise from going through the external coolers and then the radiator ?
The technical reason for radiator last has been defined.
Please explain why it is BS and the wrong way to rout the lines.
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Old 05-14-2014, 08:33 AM
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[ATTACH]http://www.bulkpart.com/transmission-cooler.html[/ATTACH]


This is from a Ford factory service manual showing proper cooler routing.

The broken line is pressure and enters the radiator then external cooler.

Todays engines run hot. 210 and up is not uncommon when towing.

Transmission fluid enters the radiator to cool from a hot pull reducing it's temperature by a significant amount. Then into the external cooler where it receives more cooling then back to the transmission.

By routing it through the external cooler then the radiator does not give extra cooling. In fact it defeats the purpose.
Transmission fluid runs around 140-175 degrees in a normal situation. Put it to work and temperature can rise easily to 250 degrees. Running it through the external cooler first will cool it a significant amount. Then running it through the radiator actually raises the temperature to what the engine is running at. 210 plus degrees. Then introducing preheated fluid back into the transmission.
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Old 05-14-2014, 08:34 AM
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I bought a temp gauge for my truck last fall. The temp never got over 150 all winter. It has the factory routing, trans to rad to cooler. Was kind of leery of the gauge, so I bought an infa red temp gun....gauge is right on. Maybe with it plumbed the other way, it may get more heat, but I tow a 5th wheel in the summer, so it stays as it is
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