trans cooler questions - Dodge Cummins Diesel Forum
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post #1 of 7 (permalink) Old 08-07-2014, 09:46 PM Thread Starter
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trans cooler questions

okay,,my 2013 2500 diesel broke down last week in Pa. Originally, the rad went but it was the trans cooler that went. It took a week to get a radiator but the dealer replaced the original cooler with a different one. There are two coolers listed by mopar for the truck. One is 52014715AA and the other is 52014588AA. The first part number was installed on my truck. Does anyone know what the difference is between the two parts? Dealer said the only real difference is one of the mounting brackets.
Does anyone know what the options are for factory trans coolers?
Thank you for any help that I may get.


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post #2 of 7 (permalink) Old 08-08-2014, 08:39 AM
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52014715AA is the correct cooler for your truck. 52014588AA is for a gas engine truck.
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post #3 of 7 (permalink) Old 08-08-2014, 10:26 AM Thread Starter
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thank you very much. I have tried but have had no luck, would anyone know how high the trans temp can go while towing without problems on a regular basis?
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post #4 of 7 (permalink) Old 08-08-2014, 10:56 AM
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How hot are you running?
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post #5 of 7 (permalink) Old 08-10-2014, 01:52 PM Thread Starter
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Sorry to be away for so long. It used to run no higher than 190 towing 8000 lbs in traffic but on the way home after the dealer the trans ran up to 201 in traffic and 170 after 5 min running down the highway at 65. Even after parking the trailer and letting the truck idle the trans temp never seemed to go down. When I parked the truck after getting fuel and a stop at the store, I let the truck idle and the trans temp went up 5 degrees to 175 just in the driveway. The trans was never that warm in the past and always cooled while idling. I know the dipstick says to check when at 180 but....
Is there a different cooler for the diesel when it has the snow plow prep package?

Thank you for all of the help.
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post #6 of 7 (permalink) Old 08-11-2014, 08:03 AM
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I wouldn't worry about running 190-200F sump temp if towing a trailer in stop and go traffic. Even running in the 200-220F range isn't bad, although I wouldn't want to run there all day long. Brief spikes over that (to 240F) are also OK. I would be uneasy running over 240F, although brief spikes above this will not instantly kill your trans.

Cooler is better (for durability). Life goes down as the temp goes higher, and the relationship is not linear, but exponential, so the hotter it gets, the faster your life drops. But let's suppose (just to pull numbers out of the air, for an example) that your trans life at 220F sump is one-half what it is at 190F. If you run at 220F sump for 10 minutes, then you have done the same damage as driving it for 20 minutes at 190F. So while higher temps are not desirable, they will not instantly fail the trans. You simply use up its life a little faster. Overall then, keep an eye on your temps, but you don't need to panic or obsess if the temp spikes up higher for a few minutes.

Two tips to help keep your temps under control: (1) When climbing a steep grade towing a trailer at low speeds (like mountain switchbacks), drop the trans down to the LOWEST gear you can get ("1" at speeds below about 22 mph). This will give you higher engine speed, but it will greatly reduce the slip within the torque converter, which will greatly reduce the amount of heat you are dumping into the trans. (2) When stopped in traffic, shift the trans to Neutral. This will also reduce the heat being generated inside the converter.
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post #7 of 7 (permalink) Old 08-11-2014, 02:17 PM Thread Starter
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Thank you very much. I already do your suggestions but thank you for the info on the temps.
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