Trans heat exchanger alternatives (torque converter cooler - Dodge Cummins Diesel Forum
3rd Gen. Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect...NO ADVERTISING

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post #1 of 35 (permalink) Old 02-08-2019, 12:53 PM Thread Starter
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Trans heat exchanger alternatives (torque converter cooler

Hey guys have an 07 ram 2500 5.9 4wd megacab // the heat exchanger/ torque converter cooler for the trans circuit internally blew and now have a strawberry milkshake... The bad kind, lol. So after rebuilding the trans which i will do i quoted the cooler assembly at the dealer (at employee cost) and it comes out to 622.60 part number 68253200aa. What the heck! Are they made out of gold!, lol. So i am shopping around and see some aftermarkets all over google and ebay fro 30-200 dollar range as refurbished items. My question is does anyone have a good alternative or have had any experiences good or bad from these more affordable options on the aftermarket scene. Also i looked into the fleece by pass but it has you plug the cooler and just bypass the colling system part of the exchanger, also its too much for me as my truc, is stock and will not be upgrading it or racing in this thing at all, dont think its the right solution. Thank for any iput yall have out there. Also forgot mto mention its a 48re lol, kinda obvious i know but just wanted to be clear. Thanks again guys!



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post #2 of 35 (permalink) Old 02-08-2019, 12:54 PM Thread Starter
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Also forgot to mention this cooler is mounted to the side of the engine block just passed where the trans bell housing mounts to the engine on the passengers side.


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post #3 of 35 (permalink) Old 02-08-2019, 01:47 PM
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Here's a new OEM on ebay for $400. Tempting for me to grab one and throw it in my parts box.

https://www.ebay.com/itm/Cummins-Mop....c100005.m1851
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post #4 of 35 (permalink) Old 02-08-2019, 02:40 PM
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Got one I took off, $20 plus the ride. 😁

2015 DRW 3500 CC 4x4 Laramie, bone stock
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post #5 of 35 (permalink) Old 02-08-2019, 02:50 PM
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NEW Replacement 68004317AA TRANSMISSION OIL COOLER for DODGE RAM 2500 3500 DIESEL 5.9L



Here's one for 150 some on ebay for 50

Sent from my SM-N950U1 using Tapatalk

2005 Crew 4x4 3500
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post #6 of 35 (permalink) Old 02-10-2019, 05:00 PM
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Why would you ever put another one of those in ? It killed your trans . Def a failure prone part .

a. If you don't tow , hot rod repeatedly or have a low stall converter , you don't need it .

b. Or go for the Misimoto ( sp ) big cooler up front , or perhaps a fan / cooler mounted up near the skid plate crossmember as several have . Some work and fab fit up but that's a good set up IMO.

Good luck sir
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post #7 of 35 (permalink) Old 02-10-2019, 05:21 PM
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I went through this myself!

https://www.cumminsforum.com/forum/3...ant-trans.html

At the very least, drop the valve body to get as much of the strawberry YooHoo out of the transmission as you can. I changed my transmission but only because I had a rebuilt sitting in the shop waiting for an opportunity.

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post #8 of 35 (permalink) Old 02-10-2019, 06:52 PM
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Once that coolant gets in the transmission, it's over. The frictions start to delaminate. There is no way around it. A rebuild is in your future.

I 2nd Sparkey's reply. Do not put another one of those things on your truck. Look at my sig, that's how I addressed mine. The aux cooler has a 10" fan and moves 800cfm and the cooler is supposed to cool 67,000btu per hour. I have noticed that my engine temperature is higher now without the torque converter cooler, that tells me the the transmission was cooling the engine and the transmission certainly does not need anymore heat put into it.

Gil
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post #9 of 35 (permalink) Old 02-11-2019, 08:41 AM
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Quote:
Originally Posted by Gildo View Post
Once that coolant gets in the transmission, it's over. The frictions start to delaminate. There is no way around it. A rebuild is in your future.

I 2nd Sparkey's reply. Do not put another one of those things on your truck. Look at my sig, that's how I addressed mine. The aux cooler has a 10" fan and moves 800cfm and the cooler is supposed to cool 67,000btu per hour. I have noticed that my engine temperature is higher now without the torque converter cooler, that tells me the the transmission was cooling the engine and the transmission certainly does not need anymore heat put into it.

Gil
And here we have a solution , def some fab work but effective transmission fluid cooling and will not kill your auto trans with engine coolant .

SOLD My 2001 and 2005 .
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post #10 of 35 (permalink) Old 02-11-2019, 09:50 AM
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I'd also agree with NOT putting another one back in. I ran without one for a long time on just the front cooler and had no issues, no towing though. I ended up putting a derale cooler with a fan under the cab to act as a heat sink. Never did hook up the fan, never needed it. That fan switch though was on the output side of the cooler which dumped back into the trans.

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post #11 of 35 (permalink) Old 02-11-2019, 10:23 AM
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Once Iím able to install a modified valve body allowing lock up in all forward gears Iíll delete mine.

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post #12 of 35 (permalink) Old 02-11-2019, 10:57 AM
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It's all about that temp gauge. If you can keep your pan temps in check with just the aux cooler up front (unlikely if you're working it hard), you're good. If not, well you have some work to do and some money to spend.

The torque converter cooler (heat exchanger) that the factory used is very good at its job, but yes, there are some failures, so I understand why people sleep better knowing that it's not in the loop anymore. Believe me...I DO understand... But, if you're working it hard, in a hot environment, you'll likely end up fighting with temps at times without some significant additional cooling.

Here is a setup that I've used with excellent results:
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