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Dodge Ram 5.9L/6.7L Cummins Transmission Cooler, 2003-2009

Dodge Ram 5.9L/6.7L Cummins Transmission Cooler, 2003-2009
Dodge Ram 5.9L/6.7L Cummins Transmission Cooler, 2003-2009
Dodge Ram 5.9L/6.7L Cummins Transmission Cooler, 2003-2009
Dodge Ram 5.9L/6.7L Cummins Transmission Cooler, 2003-2009
Installation
Installation
Engineering
Engineering

Regular Price: $525.00

Sale Price $410.95

Reward Points You will earn 411 Points for purchasing this product.
Installation Difficulty

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  • Fits all 2003–2009 Dodge Ram 5.9L & 6.7L Cummins*
  • 212% Increase in core volume
  • 244% Increase in fluid capacity
  • Includes fully serviceable thermostat for fast warm-up in cold climates and thermostat bypass for constant cooling in hot climates
  • Stacked-plate design for tough and reliable cooling
  • Eliminates corrosion-prone quick-disconnect fittings
  • Mishimoto Lifetime Warranty
  • Estimated Ship Date: October 2018
  • Note: Coupons and discounts do not apply to items in pre-sale

There’s no greater enemy for a transmission than heat. Whether your 2003–2009 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. Luckily, Mishimoto has developed a direct-fit transmission cooler to do just that. Our 2003–2009 Dodge Ram 5.9L/6.7L Cummins transmission cooler utilizes a stacked plate core for durable and powerful cooling. With a massive 212% greater core volume and 244% increase in fluid capacity, this trans cooler is a huge improvement over stock 2003-2009 Dodge Ram 5.9L / 6.7L Cummins transmission cooler.

The Mishimoto transmission cooler is not only larger than the stock cooler, but more reliable too. When the stock cooler’s thermostat fails, it fails closed, bypassing the cooler and returning hot fluid to the transmission. Mishimoto has solved this common issue by making the thermostat in our 2003–2009 Dodge Ram Cummins transmission cooler fully serviceable and easily bypassed for constant cooling. A port located at the top of the cooler provides easy access to the thermostat for servicing in just a few minutes. Replacement thermostats can be purchased individually if needed; no more replacing the entire cooler if the thermostat fails. Owners in cold climates can still enjoy the fast warmup times that the thermostat provides, while owners in hot climates can choose to bypass the thermostat by replacing it with the supplied stainless-steel bypass plug.

To make this cooler even easier to install and service, Mishimoto saves you the hassle of removing seized fittings. The provided CNC-machined, stainless steel hose barb fittings let you cut to the chase, literally. These fittings and the supplied transmission cooler hose allow you to remove the quick-disconnect fittings and connect the stock soft-line to the Mishimoto cooler.

Like all Mishimoto products, this transmission cooler is backed up by our Lifetime Warranty with Accident Protection for worry free cooling as long as you own it.

Mishimoto Automotive (“Mishimoto”) warrants its products under this lifetime limited warranty policy (“Warranty Policy”). This Warranty Policy applies solely to: (i) Mishimoto Products purchased directly from Mishimoto or Mishimoto authorized dealers (each a “Mishimoto Product” and collectively, the “Mishimoto Products”) and (ii) the original purchaser of such Mishimoto Product (“Purchaser”). This Warranty Policy is non-transferable and all claims under this Warranty Policy must be accompanied by the original sales receipt. The terms and conditions of this Warranty Policy are subject to change by Mishimoto at any time without notice.

For our complete warranty policy, please click here.

EVEN MORE COOL ITEMS

TECH SPECS

SKU MMTC-RAM-03SL

Material 6061 Aluminum

Core Height 10.94"

Rows 48

Note * This kit requires cutting of the stock transmission cooler lines to remove the quick-disconnect fittings. Mishimoto provides CNC-machined stainless steel hose barb fittings to splice the supplied transmission cooler line with the stock soft-lines. Please see installation instructions for more details.

Core Thickness 0.87"

Core Length 26"

Fitting Size 3/4"-16 SAE ORB

Engine Codes 5.9L Cummins w/ 47RE Transmission
5.9L Cummins w/ 48RE Transmission
6.7L Cummins w/ 68RFE Transmission

Increase In Oil Capacity 0.88 qts

Purchase Includes (1) Mishimoto Stacked-Plate Transmission Cooler
(2) High-Pressure Transmission Cooler Lines
(1) Removable Thermostat
(1) Removable Thermostat Bypass
(2) CNC-Machined Stainless Steel Barbed Fittings
(2) CNC-Machined Aluminum 3/4"-16 ORB to Hose Barb Fittings
(6) Worm Gear Clamps
Mishimoto Lifetime Warranty

Also Fits 2003-2007 Dodge Ram 2500 5.9L Cummins I6
2007.5-2009 Dodge Ram 2500 6.7L Cummins I6

2003-2007 Dodge Ram 3500 5.9L Cummins I6
2007.5-2009 Dodge Ram 3500 6.7L Cummins I6

Engineering Blog

A Cooler for Atlas – Transmission Cooler R&D, Part 4: Testing

A Cooler for Atlas – Transmission Cooler R&D, Part 4: Testing

August 26, 2018

This 2003-2009 Dodge Ram 5.9L/6.7L Cummins Transmission Cooler is now available! Click here to check it out! After all the time spent designing, welding, prototyping, and fitting, we were more than anxious to test the cooler and see if all our work would pay off. Testing wouldn’t be easy though. The weather outside was growing … Continue reading A Cooler for Atlas – Transmission Cooler R&D, Part 4: Testing → The post A Cooler for Atlas – Transmission Cooler R&D, Part 4: Testing appeared first on Mishimoto Engineering Blog.

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A Cooler for Atlas – Transmission Cooler R&D, Part 3: Prototype – Continued

A Cooler for Atlas – Transmission Cooler R&D, Part 3: Prototype – Continued

February 06, 2018

This 2003-2009 Dodge Ram 5.9L/6.7L Cummins Transmission Cooler is now available! Click here to check it out! As our volunteer truck rolled into the shop, Dan began gathering his tools for a short, and ultimately rewarding, install. Removing the intercooler was second nature to him and before long, the stock transmission cooler was sitting next … Continue reading A Cooler for Atlas – Transmission Cooler R&D, Part 3: Prototype – Continued → The post A Cooler for Atlas – Transmission Cooler R&D, Part 3: Prototype – Continued...

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A Cooler for Atlas – Transmission Cooler R&D, Part 2: Prototype

A Cooler for Atlas – Transmission Cooler R&D, Part 2: Prototype

November 20, 2017

This 2003-2009 Dodge Ram 5.9L/6.7L Cummins Transmission Cooler is now available! Click here to check it out! From the outside, you wouldn’t think that the modern pickup truck is exactly the evolution of Henry Ford’s Model T. Under the surface however, you might find that the two are more related than they appear. The Model … Continue reading A Cooler for Atlas – Transmission Cooler R&D, Part 2: Prototype → The post A Cooler for Atlas – Transmission Cooler R&D, Part 2: Prototype appeared first on Mishimoto Engineering Blog.

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