The 7 Best Diesel Transmission Coolers (2022 reviews)

The Mishimoto Diesel Transmission Cooler has good features for the price point. The mishimoto diesel transmission cooler fits all 2003–2009 dodge rams 5.9l & 6.7l cummins. 2009 dodge ram 5.9l/6.7l cummins is a dedicated tow vehicle, hardworking fleet truck, or a daily driver with a liking for the drag-strip, You need to ensure that your transmission runs cool. The stock cooler ’s thermostat fails, it fails closed, bypassing the cooler and returning hot fluid to the transmission.

Above all, the mishimoto diesel transmission cooler makes for a great replacement, is great for customer service, it is flexible and has an excellent design.

Almost all buyers found that the cooler allows the cooler thermostat to be eliminated depending upon the climate that the cooler is deployed in. Further, a few strongly agree that the cooler provides better cooling that factory. In addition, a few strongly agree that the mishimoto trans cooler looks to be of very high quality, especially when compared to the oem unit. To sum up, at the price, they believe that they got a steal of a deal with it.

Customers say that getting a 32 rh deep transmission pan and _grasshopper_ hydrostatic transmission fluid change, along with cooler is useful.

Top Customer Quotes:

Fits all 2003-2009 dodge ram 5.9l & 6.7l cummins.
159% increase in fin surface area.
This is a dodge ram transmission savior.
The 2009 dodge ram cummins transmission cooler is fully serviceable and easily bypassed for constant cooling.

Best For Automatic Transmission: Marketplace Auto Parts Diesel Transmission Cooler

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The Marketplace Auto Parts Diesel Transmission Cooler is suitable and reliable and fits well with your daily uses. Make sure this fits by entering your model number. . The cooler is easy to maintain and gels well with your daily needs.

Why We Like This:

6.6l v8 diesel; automatic transmission oil cooler: aluminum.
Review description to ensure proper fit.
Compatible with or fits: 2008 - 2010 chevy silverado 3500 hd 6.6l v8.

RELATED: Best Gl4 Transmission Oils

Best With Part Number: Novaparts Diesel Transmission Cooler

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The Novaparts Diesel Transmission Cooler should be able to handle its purpose and duties with ease. Please check the fitment before buying. Install an auto transmission oil cooler with base torque converter cooler for 2003, 2004, 2005, 2006, 2007, 2008 2009 dodge ram 2500 dodge ram 3500 with 5.9 cummins diesel. In short, with a 4.3 rating and more than 344 buyers, the novaparts diesel transmission cooler stands as the best choice.

One customer says - "So break out your jeweler's files and remove that paint fellas. ". Most customers agree that the cooler is a great fit and so far so good, will update later if something changes.

Customers discovered that getting a fitting 47 re transmission cooler line and pre bent transmission line, along with cooler is useful.

Why We Like This:

Warranty: 180 days; you can get a refund or replacement.
Part no. : 68253200aa, 68004317aa, 5086946aa, 5086946ab.
High quality oem replacement part; aftermarket products.

Best For Last A While: Evil Energy Diesel Transmission Cooler

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Next on the list, we've got yet another cooler that manages to win our hearts. It's the Evil Energy Diesel Transmission Cooler and it's widely considered as the cooler that has the most suitable features. The evil energy diesel transmission cooler is more efficient and it is best for o-ring. Please check part number before purchase. Also, the cooler is highly recommended, plus it is made of aluminium alloy, and the bracket is steel.

Lastly, the evil energy diesel transmissioncooler is critically important to use carefully when installing the cooler lines to the cooler.

In short, for almost all buyers, the cooler was what they were looking for.

Customers discovered that getting a fitting 47 re transmission cooler line and diesel transmission cooler, with this cooler made their life much easier.

Why We Like This:

This is made to last a while and it has replaced part number.
Replace part number: 68253200aa, 68004317aa, 5086946aa, 5086946ab. Please check part number before purchase.
Lot of satisfied buyers.

Best For Crew Cab Pickup: Topaz Diesel Transmission Cooler

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The Topaz Diesel Transmission Cooler is capable of outshining several other coolers featured in this list in overall features in its price range. The topaz dieseltransmission cooler is a brand of aftermarket automotive thermo-part professional, providing the total solution for aftermarket replacement from engine thermo management system to air condition. Making an aftermarket product with premium quality. Also, this works great, for crew cab pickup and it is designed for perfect match.

Above all, the topaz diesel transmission cooler is designed for the original equipment part and it is designed for the good part.

"That you buy a new cooler, not used. " - says, one customer. In short, for most buyers, it was just what they wanted.

Few customers bought automatic transmission cooler line and diesel transmission cooler, along with the cooler.

Why We Like This:

This match for the original car.
Replacement oem ( original equipment part) number: 68253200aa, 68004317aa, 5086946aa, 5086946ab.
This fits the following vehicles.
For dodge ram 2500 ram 3500 in 2003, 2004, 2005, 2006, 2007, 2008, 2009.

Best For Great Price: Partsflow Diesel Transmission Cooler

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Not everyone likes to purchase a cooler for their regular use, but the Partsflow Diesel Transmission Cooler would be an anomoly. Manufacturer says: We source our products globally, buying from oem and aftermarket manufacturers. And, the cooler is a supplier of automotive and light truck parts and accessories at deep discounted prices. When it comes to finding an optimal cooler, the partsflow diesel transmissioncooler is definitely your first choice.

"If you are mechanically inclined, you can have better cooling and a longer life of your transmission. " - says, one customer. In short, many customers have used the cooler for more than a few months without letup, and it shows no sign of giving up.

Customers found that buying a gl4 transmission oil, along with cooler is useful.

Why We Like This:

For 2011-2015 gmc sierra 2500 hd / sierra 3500 hd.
New and hot releases.

Best For High Quality: American Cooling Solutions Diesel Transmission Cooler

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Not everyone likes to purchase a coolers for their daily usage, but the American cooling solutions dieseltransmission cooler would be an anomoly. The American cooling solutions diesel transmission cooler comes with part numbers and it fits for cross reference. The Manufacturer says: We only sell high quality brand new parts. In addition, it is made in the USA and includes a full one - year warranty.

Lastly, the American cooling solutions diesel transmission cooler is an acs drop-in, brand new torque converter oil replacement cooler for a 2003.

Why We Like This:

Meets or exceeds original oem specifications.
Made in the USA and includes a full one - year warranty.
One of the newcomers and featured product.