Is this an auxiliary trans cooler?
01-29-2019, 03:32 PM
#11
I didnt think the pre-2018 design was all that great. I think the OTW exchanger put too much heat back into the coolant just before it went back into the engine and caused high coolant temps, so I am a little disappointed to hear this. Hopefully it works better this time around.
01-29-2019, 09:42 PM
#12
I didnt think the pre-2018 design was all that great. I think the OTW exchanger put too much heat back into the coolant just before it went back into the engine and caused high coolant temps, so I am a little disappointed to hear this. Hopefully it works better this time around.
01-30-2019, 04:50 AM
#13
You can follow the inlet and outlet cooling lines under the truck and see where they go.
01-30-2019, 07:45 AM
#14
Are you saying that your 2019 has two auxiliary transmission coolers? A small radiator (in front of the main radiator) where they bring the ATF fluid to cool it by air, and then also a fluid-to-fluid exchanger where the ATF fluid is cooled by the engine coolant?
01-30-2019, 07:48 AM
#15
Isn't the one at the bottom the intercooler? The OTA on my is closer to the top.
So the new one isn't working that well? I haven't heard one way or another until not. The one he has pictures where the coils are in front of the rad definitely looks to be the tranny cooler to me anyway. From what I've read, all 2017 3.5 came with the OTA cooler and it was the same one on all models.
So the new one isn't working that well? I haven't heard one way or another until not. The one he has pictures where the coils are in front of the rad definitely looks to be the tranny cooler to me anyway. From what I've read, all 2017 3.5 came with the OTA cooler and it was the same one on all models.
01-30-2019, 07:55 AM
#16
01-30-2019, 12:11 PM
#17
Senior Member
You get LESS cooling of charge air by running it through an integrated radiator ATW cooler, and the engine coolant picks up additional heat that must be dumped. The only reason to run charge air through a radiator is to prevent condensation, and it's not worth when a condensation fix is a simple weep hole, drain ****, or catch can.
01-30-2019, 01:35 PM
#18
Grumpy Old Man
I'm a little confused.
Are you saying that your 2019 has two auxiliary transmission coolers? A small radiator (in front of the main radiator) where they bring the ATF fluid to cool it by air, and then also a fluid-to-fluid exchanger where the ATF fluid is cooled by the engine coolant?
Are you saying that your 2019 has two auxiliary transmission coolers? A small radiator (in front of the main radiator) where they bring the ATF fluid to cool it by air, and then also a fluid-to-fluid exchanger where the ATF fluid is cooled by the engine coolant?
But I don't see an auxiliary tranny cooler in my 2019 with the max tow pkg. My Ford service manager looked in his dealer service department docs and doesn't see an auxiliary tranny cooler in any F-150 with any engine or towing package. So I suspect the order guide was incorrect.
In theory, the increased coolant capacity and the increased power of the engine fan to suck more air through the radiator to suck more heat out of the coolant was satisfactory for tranny cooling without the cost of an OTA heat exchanger.
Last edited by smokeywren; 01-30-2019 at 09:55 PM.
The following users liked this post:
Engineer Guy (09-08-2019)
01-30-2019, 02:12 PM
#19
Yes. All 2011-up F-150s have an OTW tranny cooler - not an "auxiliary" or additional tranny cooler, but THE tranny cooler. For 2018 Ford moved the OTW cooler from the bottom of the radiator to behind the radiator, increased the capacity of the radiator and engine fan, and there was no option with an AUXILIARY tranny cooler. For 2011 thru 2017 F-150s with a towing package, Ford added an OTA auxiliary tranny cooler in front of the radiator. For 2019 they added it back in front of the radiator. So the 2018 is the bastard child of F-150 tranny cooling systems.
In theory, the increased coolant capacity and the increased power of the engine fan to suck more air through the radiator to suck more heat out of the coolant was satisfactory for ttanny cooling without the cost of an OTA heat exchanger. But after a few months of real-world experience, Ford again has an auxiliary tranny cooler in front of the radiator.
In theory, the increased coolant capacity and the increased power of the engine fan to suck more air through the radiator to suck more heat out of the coolant was satisfactory for ttanny cooling without the cost of an OTA heat exchanger. But after a few months of real-world experience, Ford again has an auxiliary tranny cooler in front of the radiator.
I’m just a little surprised since I haven’t heard of 2018s having issues with keeping the trannies cool. I’m interested because I have one
Last edited by kehyler; 01-30-2019 at 02:17 PM.
01-30-2019, 02:13 PM
#20
You get LESS cooling of charge air by running it through an integrated radiator ATW cooler, and the engine coolant picks up additional heat that must be dumped. The only reason to run charge air through a radiator is to prevent condensation, and it's not worth when a condensation fix is a simple weep hole, drain ****, or catch can.