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  #1  
Old 01-14-2014, 09:20 AM
pitch1 pitch1 is offline
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Default Heavy duty transmission cooling

What does Ram mean by this? I tow a 6000# travel trailer, salesman said I did not need an external cooler. I have seen tranny temps just under 200. What is too high? Do I need an additional cooler?
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Old 01-14-2014, 09:25 AM
bartlett bartlett is offline
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200 is very safe yet. normal is from 150-220 ..you start bumping 230-240 your looking for a added cooler.

I always go by. your trans temp should be close to your engine temp.. truck runs 200 trans runs 200 ... if your truck is running 200 and the trans is 240 ...you got problems....

Last edited by bartlett; 01-14-2014 at 09:33 AM.
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Old 01-14-2014, 07:52 PM
huntergreen huntergreen is offline
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adding a cooler wouldn't hurt.
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Old 01-14-2014, 10:12 PM
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Your truck has a trans cooler,it's integral with the ac condensor(it's the top ~10 rows). bartlett's comments are spot on. They define "normal" or "average" as 180 deg F.
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Old 01-15-2014, 12:21 AM
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200 degrees now. Towing 6K with the AC on, in the depths of summer, may change that.
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Old 01-15-2014, 05:31 AM
bartlett bartlett is offline
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Trans fluid can handle 270 degrees. your truck can pull 6,000lbs all day all night all summer ac on up hill in a head wind with one trailer brake sticking and a low tire. drive it
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Old 01-15-2014, 02:05 PM
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I'm wondering why these trans temps are that high. I checked mine yesterday and my trans temp was running between 120 and 130. I have never seen anything above 160 on the hottest day.
Here is what I had going about 65mph after about 30 minutes of stop & go due to construction. My trans temp was 122.
Sorry it's kind of blurry, hard to take the picture and drive at the same time.
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File Type: jpg Picture2.jpg (78.7 KB, 9 views)
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Old 01-15-2014, 02:50 PM
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are you pulling a 6,000lb trailer ? 120F for a trans is very cool for a 70 degree day. it takes a good 1hr of easy no trailer driving to get upto temp .
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Old 01-15-2014, 03:22 PM
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The websites that i get the best information from, all read that the transmission temperature should be the same as the engine oil temperature

A segment exclusive on the 2013 Ram 1500 is a new thermal management system, designed to quickly raise the transmission fluid temperatures to cut parasitic losses and wear, improving fuel efficiency by 1.7%. It is enabled by an electronic thermostat which constantly monitors antifreeze temperature; once it’s hot enough, warm engine coolant is circulated through a thermal exchange unit which heats up the transmission fluid. In most vehicles, the transmission heats up independently of the engine. (The system also works for engine oil.)

Chrysler’s Dave Sowers said:


We get benefit from bringing both of them [oil and transmission fluid] up to operating temperature faster. The primary benefit comes in the transmission. In colder climates, you could drive a vehicle for hours in the winter and the transmission might never reach that 190 (F) for the most efficient operation. So what we do is use some of that hot engine coolant through the heat exchanger to bring it up to 190 as quickly as possible, and that gives us efficient operation very quickly.


Original is at 2013-2014 Dodge Ram 1500 engine, transmission, and axles (powertrain) http://www.allpar.com/model/ram/dodg...#ixzz2qV5TRk86
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Old 01-15-2014, 05:01 PM
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How are you guys monitoring your temps? My in truck gauge has no temp markings on it
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