Internal transmission cooler
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Tuned
Joined: Nov 2003
Posts: 454
Likes: 8
From: CT
Internal transmission cooler
Why does Ford pump tranny fluid trough the radiator cooler if the vehicle has a external cooler? You would think that the transmission would absorb heat from the radiator, no?
I am thinking about bypassing the internal coolar and running with just the external, at least for the summer towing season. I could understand in the winter to get the transmission to a "working temp faster"
Does anyone know what the avg coolant temp is that is flowing by the cooler, I guess on a hot day it would be about 150.
Comments?
I am thinking about bypassing the internal coolar and running with just the external, at least for the summer towing season. I could understand in the winter to get the transmission to a "working temp faster"
Does anyone know what the avg coolant temp is that is flowing by the cooler, I guess on a hot day it would be about 150.
Comments?
Posting Guru
Joined: Aug 2000
Posts: 1,984
Likes: 2
Kurthb, 150* is probably a good guess, since the ATF cooler is always on the coolest side of the radiator (in a crossflow design). The ATF cooler is also more efficient because it's liquid to liquid, rather than air to liquid. I would keep the factory radiator cooler and add an external cooler if needed.
While under my Explorer at the last oil change, I got to thinking how close the catalytic converter was to the transmission. Since the cat can put out up to 1200*F, the transmission had to be soaking up a lot of radiated heat. I then installed a piece of galvanized sheet steel between the trans and cat to act as a heat shield. I feel this is cooling off the ATF a bit, but since I don't have a temp gauge on the trans, can't say for sure.....
While under my Explorer at the last oil change, I got to thinking how close the catalytic converter was to the transmission. Since the cat can put out up to 1200*F, the transmission had to be soaking up a lot of radiated heat. I then installed a piece of galvanized sheet steel between the trans and cat to act as a heat shield. I feel this is cooling off the ATF a bit, but since I don't have a temp gauge on the trans, can't say for sure.....
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Tuned
Joined: Nov 2003
Posts: 454
Likes: 8
From: CT
While towing the other weekend, 85 ambient temp...
IN OD cruising along the freeway at 65 the transmission temp was 170-175.
Out if OD where there was a moderate grade 180-185
Climbing a good grade in 2nd 185 to 190
stop and go crawling in traffic nothing less than 187
This was monitored by a OBD-II scanner, the tranny temp sensor is right in the pan.
I would like to bring the temps down to about 150 while towing.
From what I have heard, the transmission can't run too cool (within reason)
IN OD cruising along the freeway at 65 the transmission temp was 170-175.
Out if OD where there was a moderate grade 180-185
Climbing a good grade in 2nd 185 to 190
stop and go crawling in traffic nothing less than 187
This was monitored by a OBD-II scanner, the tranny temp sensor is right in the pan.
I would like to bring the temps down to about 150 while towing.
From what I have heard, the transmission can't run too cool (within reason)
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