Adding Derale Trans Cooler behind existing factory cooler?

[Merc1973]

I just ordered the D13504 from etrailer.com

http://www.etrailer.com/Transmission-Coolers/GMC/Yukon/2003/D13504.html?vehicleid=2003749834

I watched the installation video. Will this fit behind the tiny factory cooler?

 

[TheAutumnWind]

Behind? No. Alongside? sure.

 

[Merc1973]

Behind? No. Alongside? sure.

Thanks. Did you install one?

 

[TheAutumnWind]

Thanks. Did you install one?

I have a similarly sized Hayden Cooler. I installed mine in place of the factory cooler. Wish that I had thought to install it in addition to the factory cooler like you are planning. I've seen it done somewhere before.

 

[Merc1973]

I have a similarly sized Hayden Cooler. I installed mine in place of the factory cooler. Wish that I had thought to install it in addition to the factory cooler like you are planning. I've seen it done somewhere before.

Awesome, thanks!

 

[YukonXL04]

Mine didn't have the factory external cooler. Just the one that runs through the radiator. I did use both. I believe in the derali, then into the radiator and then back to the trans

 

[01ssreda4]

Mine didn't have the factory external cooler. Just the one that runs through the radiator. I did use both. I believe in the derali, then into the radiator and then back to the trans

Well that was nice and pointless. The stock "cooler" is a coiled tube running inside through the radiator end cap. It has no airflow, it simply runs through coolant and back out. What happens when you pour a room temp drink (70 degrees) over ice (0-10 degrees)???? The two temps merge don't they? The drink drops 30 degrees, and the ice raises 30 degrees causing it to melt. You get some median temp between the two. Now imagine your trans is ambient, say 80 degrees, in 10 min your coolant is up to 200 degrees, and you run you trans fluid through it, then what happens? Sound more like its a heater to me.

 

[TheAutumnWind]

Well that was nice and pointless. The stock "cooler" is a coiled tube running inside through the radiator end cap. It has no airflow, it simply runs through coolant and back out. What happens when you pour a room temp drink (70 degrees) over ice (0-10 degrees)???? The two temps merge don't they? The drink drops 30 degrees, and the ice raises 30 degrees causing it to melt. You get some median temp between the two. Now imagine your trans is ambient, say 80 degrees, in 10 min your coolant is up to 200 degrees, and you run you trans fluid through it, then what happens? Sound more like its a heater to me.

It does help to warm up the trans in cold climates. At best it would help to keep the trans fluid around 210* which of course is hotter than youd like your transmission to run at.

I have mine routed the same. The hottest ive seen trans temps with my cooler is ~190 @ 110+* ambient in the mountains fully loaded. Thats hotter than Id like, but decent considering thats as hard as Im ever going to push this rig.

 

[Merc1973]

So leave it routed through the radiator and stock tow package cooler and finally out through the Derale cooler?

 

[retiredsparky]

Most OEM oil to air coolers are connected after the radiator. They take out excess tranny heat not removed in the radiator. Tranny fluid can easily handle 230 degrees. It will last a long time at any temp below that. So yes, anywhere after the radiator oil to water internal cooler.