Upgraded trans cooler from Fordparts

[B E N]

203 is pretty good. You have to remember the fluid circulates through the radiator first. This is done to get the fluid up to operating temp quicker, heat exchange occurs between the engine coolant in the radiator and the trans fluid. The bad part is as the radiator starts to heat soak under load it puts more heat into the trans fluid which is then extracted via the secondary trans cooler. Towing puts a lot of heat in the truck, its going somewhere, if the airflow can't take it all out it's going somewhere else.

Also, the OEM temp sensor is in the valve body, this location isn't a good indicator of return temps. If you want to know how much change your actually getting you would want a sensor mounted in the pan, or in the return path.

 

[MrGable27]

it lowers the temp ZERO!
I drive to my cabin 3 hours away in all weather, towing a trailer every single time. I log temps and fuel.
This cooler didn’t change the temp AT ALL! not one single degree!

I make this trip 2-3x a month.
Exact same route

Towing an enclosed car trailer on a 110 degree summer day (desert life), it dropped my trans temps from 228 to 205. Interesting it didn’t make a difference for you.

 

[pat247]

This mod just begs to be done, it fits the Raptor better than the original. Like others have stated the temps I'm seeing with this upgrade range from 195 - 203 during a 8-10 hour drive at 75 mph. If you are seeing trans temps in the 220+ range it's a must have.

 

[MTF]

Towing an enclosed car trailer on a 110 degree summer day (desert life), it dropped my trans temps from 228 to 205. Interesting it didn’t make a difference for you.

If you're Supercharged as they are it won't make much of a difference, we have a large heat exchanger in front of everything and blowing hot air at the radiator.
The only way to compensate is to have the OEM radiator fans turn on sooner and at a higher percentage.

 

[myersroofer614]

it lowers the temp ZERO!
I drive to my cabin 3 hours away in all weather, towing a trailer every single time. I log temps and fuel.
This cooler didn’t change the temp AT ALL! not one single degree!

I make this trip 2-3x a month.
Exact same route

You have to change the thermostat lol

 

[myersroofer614]

I got the same results; seem to make no difference at all. But I do feel better about adding it. Just towed my boat to FL and back as I have done many times. Highest temp was 203 going over a bridge at 77mph. Normal is 195 with or without towing anything, winter or summer.

R,
HAP

Need the thermostat, then it will lower temps.

 

[TomDirt]

Also, the OEM temp sensor is in the valve body, this location isn't a good indicator of return temps. If you want to know how much change your actually getting you would want a sensor mounted in the pan, or in the return path.

This^^^

 

[Guardrail]

If you want cooler temps, You need to bypass the thermostat in the valve body with this.

6R80 Thermal Bypass Valve - Power By The Hour

The 6R80 Transmission has an internal Thermal Bypass that operates much like the thermostat in your cooling system Upon start up, the bypass is closed limiting fluid flow through the on board auxiliary transmission fluid coolers to help get the transmission up to temperature. Once it reaches its...

pbhperformance.com

I installed the bypass valve and the larger cooler. I rarely see over 200 degrees on trans temp. If you're pulling a trailer on a hot day, heat soaking from the radiator will make the temps creep up. When I get time, I'm going to try bypassing the radiator completely, just to see how much it changes the temps.

 

[doktor]

If you want cooler temps, You need to bypass the thermostat in the valve body with this.

6R80 Thermal Bypass Valve - Power By The Hour

The 6R80 Transmission has an internal Thermal Bypass that operates much like the thermostat in your cooling system Upon start up, the bypass is closed limiting fluid flow through the on board auxiliary transmission fluid coolers to help get the transmission up to temperature. Once it reaches its...

pbhperformance.com

I installed the bypass valve and the larger cooler. I rarely see over 200 degrees on trans temp. If you're pulling a trailer on a hot day, heat soaking from the radiator will make the temps creep up. When I get time, I'm going to try bypassing the radiator completely, just to see how much it changes the temps.

Agreed 100%. I put a large cooler on my 5.0 F-150 and expected a much lower trans temp, it dropped the temp about zero degrees. Knowing that didn't seem right, the new cooler was about 3X bigger, it made no sense. I did a little investigation and you need to swap out the trans thermostat with a bypass valve. After the switch, my maximum tranny temp unloaded is 165 degrees. This is in Texas on a 100-degree day. I've done the same mod to my Raptor and never see above 165 degrees.
The factory thermostat wants the trans at 200 degrees ish. You could put a cooler as big as your house and it will still run at 200 degrees without the thermostat mod. I used the Superior Solutions unit and it's an easy job. You need a few other parts while you're in there, mostly seals and a new filter.

Superior STL009 | Superior Transmission Parts - The problem solvers of the transmission industry

 

[Cody Templeton]

Agreed 100%. I put a large cooler on my 5.0 F-150 and expected a much lower trans temp, it dropped the temp about zero degrees. Knowing that didn't seem right, the new cooler was about 3X bigger, it made no sense. I did a little investigation and you need to swap out the trans thermostat with a bypass valve. After the switch, my maximum tranny temp unloaded is 165 degrees. This is in Texas on a 100-degree day. I've done the same mod to my Raptor and never see above 165 degrees.
The factory thermostat wants the trans at 200 degrees ish. You could put a cooler as big as your house and it will still run at 200 degrees without the thermostat mod. I used the Superior Solutions unit and it's an easy job. You need a few other parts while you're in there, mostly seals and a new filter.

Superior STL009 | Superior Transmission Parts - The problem solvers of the transmission industry

What's the difference between the one from Superior Solutions and this one?

6R80 Thermal Bypass Valve - Power By The Hour

The 6R80 Transmission has an internal Thermal Bypass that operates much like the thermostat in your cooling system Upon start up, the bypass is closed limiting fluid flow through the on board auxiliary transmission fluid coolers to help get the transmission up to temperature. Once it reaches its...

pbhperformance.com