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Old 07-11-2015, 05:28 PM   #11
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Any automatic transmission regardless what the O.E.M. documents as a safe operating temperature will not survive above 200F long term even if using exotic synthetic oils. The optimal temp range is 165-180F. On an F150, regardless if it has a tow package of not, if your towing above 50% of max capacity, I would install the largest capacity trans cooler you can find. The additional volume of oil the new cooler will take is as important as surface area. I had many F150's over the years as T.V, last was a 2005 with the H.D. towing package. First trip towing 8,000 lbs had paint / undercoating melting off the floor board / drive shaft tunnel. I didn't have time to put an aftermarket cooler in there before we left. I see lots of folks this year towing massive trailers with newer 1/2 ton trucks. Seems to be a war going on with manufacturers to see who is willing to out it on the line to tow the most. Whats concerning is what we are discussing is smaller trans, coolers, brakes, axles, springs. I went with the 250, got tired of burning out 1/2 ton trucks.
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Old 07-11-2015, 05:56 PM   #12
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Don't know about Fords but on the newer 1500 & up Rams the Transmission temp is in the EVIC display.
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Old 07-11-2015, 06:57 PM   #13
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Even in 100 degree temps pulling mountains in WV my tranny never runs hotter than 180 degrees. I did put in a dedicated transmission temperature gauge in my truck just for peace of mind but have never seen anything temp wise that would begin to worry me.

I also meant to say the times it does get up near 180 are usually in stop and go traffic where there is very little airflow to cool it.
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Old 07-11-2015, 07:14 PM   #14
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Another nice caveat to this for those who are just learning and/or new to towing. Even manual transmissions are subject to failure if they get to hot. On my truck, there is a heavy duty trans cooler installed and a temp gauge from Glowshift.com. A lot of the newer trucks are incorporating trans temps on the EVIC display but for those of us with older trucks and those who are using smaller 1/2 tons and SUVs for towing their TT's, coolers and guages are wise investments.
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Old 07-11-2015, 09:30 PM   #15
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I run 193 just driving around and 200 to 203 towing.
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Old 07-11-2015, 10:43 PM   #16
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Same as above ^^ for me. 2014 ram 3500 ctd towing 16k
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Old 07-12-2015, 07:33 AM   #17
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I had an aftermarket trans. Temp gauge installed on my old 7.3 psd. It avg'd 180 and if it ever got to 210 in the mtns. I would pull over and let it cool.
The mechanic I dealt with said the temp can vary depending on where the coolant line is tapped. He said to set a normal bench mark and use it for a reference. Having a gauge is key. As the 7.3 only had a idiot light.
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Old 07-12-2015, 07:56 AM   #18
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I have a 2014 Dodge Ram 1500 with the 5.7 Hemi. The towing portion in my truck manual says, if I get stuck in a traffic jam while towing a trailer, put the transmission in neutral and give the truck a bit of gas. This will bring the temperature back down.
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Old 07-12-2015, 08:36 AM   #19
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My 2015 ram 2500 6.7L Cummins has all the temperatures displayed in one display panel. Shows coolant temp, transmission temp, oil temp, and oil pressure. With me towing on level ground water temp runs 199, trans temp runs 176, oil temp runs 205, and oil pressure was about 50 psi. This was after running for over an hour on mostly level ground. Outside temp was 98 degrees also!
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Old 07-23-2015, 07:44 PM   #20
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I have a 2013 5.7 Hemi and tow a X23F. My tranny temp runs about 158 when towing and this seems to be well within range according to others on the Dodge Ram Forum. I have told to double-check the temperature rating of the transmission fluid as well.
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