Mishimoto Transmission Cooler — Fits 2003-2009 Dodge Ram 5.9L/6.7L Cummins

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SKU: MISMMTC-RAM-03SL
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Sale price$599.95 Regular price$660.00
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Mishimoto

Mishimoto is the modern leader in performance cooling — aluminum radiators, oil coolers, intercoolers, and silicone hoses for street, track, and tuner builds. Lifetime warranty on every Mishimoto product, with engineering tested at Bondurant and on track teams.

Watch in action

Protect Your Cummins Transmission from Heat Damage

The transmission in your 2003-2009 Dodge Ram equipped with the 5.9L or 6.7L Cummins engine works hard, especially when towing or hauling. Excessive heat is a major threat to transmission longevity. The Mishimoto Direct-Fit Transmission Cooler is engineered to provide robust cooling performance, ensuring your transmission stays within optimal temperature ranges, whether you're on the job site or the highway.

Massive Cooling Upgrade

This Mishimoto transmission cooler is a significant upgrade over the stock unit. It features a durable stacked plate core designed for maximum heat dissipation. Compared to the factory cooler, this unit boasts a staggering 212% increase in core volume and a 244% increase in fluid capacity. This substantial enhancement in cooling efficiency drastically reduces the risk of transmission overheating and the associated damage, offering superior reliability for your Cummins.

  • Extreme Cooling Power: Dramatically reduces transmission fluid temperatures.
  • Increased Core Volume: 212% larger than stock for superior heat exchange.
  • Higher Fluid Capacity: Holds 244% more fluid for sustained cooling.
  • Durable Stacked Plate Core: Built for demanding towing and heavy-duty use.
  • Direct Fit Design: Engineered for 2003-2009 Dodge Ram 2500/3500 with 5.9L/6.7L Cummins engines.

Ensure the reliability and longevity of your Cummins transmission. Choose the Mishimoto Transmission Cooler for unparalleled heat management.

Upgrade your Cummins cooling system with Mishimoto at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2003 Dodge Ram 2500 Laramie
2003-2009 Dodge Ram 2500 SLT
2003-2009 Dodge Ram 2500 ST
2005-2009 Dodge Ram 2500 Laramie
2006-2007 Dodge Ram 2500 Sport
2006-2007 Dodge Ram 2500 TRX4
2006-2009 Dodge Ram 2500 Power Wagon
2008-2009 Dodge Ram 2500 SXT
2003-2009 Dodge Ram 3500 SLT
2003-2009 Dodge Ram 3500 ST
2006-2007 Dodge Ram 3500 Sport
2007 Dodge Ram 3500 TRX4
2008-2009 Dodge Ram 3500 SXT

Product Details

Product Description
Part Numbers
Sizing & Fit

About Mishimoto

Mishimoto is the modern leader in performance cooling — aluminum radiators, oil coolers, intercoolers, and silicone hoses for street, track, and tuner builds. Lifetime warranty on every Mishimoto product, with engineering tested at Bondurant and on track teams.

Watch in action

Protect Your Cummins Transmission from Heat Damage

The transmission in your 2003-2009 Dodge Ram equipped with the 5.9L or 6.7L Cummins engine works hard, especially when towing or hauling. Excessive heat is a major threat to transmission longevity. The Mishimoto Direct-Fit Transmission Cooler is engineered to provide robust cooling performance, ensuring your transmission stays within optimal temperature ranges, whether you're on the job site or the highway.

Massive Cooling Upgrade

This Mishimoto transmission cooler is a significant upgrade over the stock unit. It features a durable stacked plate core designed for maximum heat dissipation. Compared to the factory cooler, this unit boasts a staggering 212% increase in core volume and a 244% increase in fluid capacity. This substantial enhancement in cooling efficiency drastically reduces the risk of transmission overheating and the associated damage, offering superior reliability for your Cummins.

  • Extreme Cooling Power: Dramatically reduces transmission fluid temperatures.
  • Increased Core Volume: 212% larger than stock for superior heat exchange.
  • Higher Fluid Capacity: Holds 244% more fluid for sustained cooling.
  • Durable Stacked Plate Core: Built for demanding towing and heavy-duty use.
  • Direct Fit Design: Engineered for 2003-2009 Dodge Ram 2500/3500 with 5.9L/6.7L Cummins engines.

Ensure the reliability and longevity of your Cummins transmission. Choose the Mishimoto Transmission Cooler for unparalleled heat management.

Upgrade your Cummins cooling system with Mishimoto at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2003 Dodge Ram 2500 Laramie
2003-2009 Dodge Ram 2500 SLT
2003-2009 Dodge Ram 2500 ST
2005-2009 Dodge Ram 2500 Laramie
2006-2007 Dodge Ram 2500 Sport
2006-2007 Dodge Ram 2500 TRX4
2006-2009 Dodge Ram 2500 Power Wagon
2008-2009 Dodge Ram 2500 SXT
2003-2009 Dodge Ram 3500 SLT
2003-2009 Dodge Ram 3500 ST
2006-2007 Dodge Ram 3500 Sport
2007 Dodge Ram 3500 TRX4
2008-2009 Dodge Ram 3500 SXT

Product Details

Product Description

About Mishimoto

Mishimoto is the modern leader in performance cooling — aluminum radiators, oil coolers, intercoolers, and silicone hoses for street, track, and tuner builds. Lifetime warranty on every Mishimoto product, with engineering tested at Bondurant and on track teams.

Watch in action

Protect Your Cummins Transmission from Heat Damage

The transmission in your 2003-2009 Dodge Ram equipped with the 5.9L or 6.7L Cummins engine works hard, especially when towing or hauling. Excessive heat is a major threat to transmission longevity. The Mishimoto Direct-Fit Transmission Cooler is engineered to provide robust cooling performance, ensuring your transmission stays within optimal temperature ranges, whether you're on the job site or the highway.

Massive Cooling Upgrade

This Mishimoto transmission cooler is a significant upgrade over the stock unit. It features a durable stacked plate core designed for maximum heat dissipation. Compared to the factory cooler, this unit boasts a staggering 212% increase in core volume and a 244% increase in fluid capacity. This substantial enhancement in cooling efficiency drastically reduces the risk of transmission overheating and the associated damage, offering superior reliability for your Cummins.

  • Extreme Cooling Power: Dramatically reduces transmission fluid temperatures.
  • Increased Core Volume: 212% larger than stock for superior heat exchange.
  • Higher Fluid Capacity: Holds 244% more fluid for sustained cooling.
  • Durable Stacked Plate Core: Built for demanding towing and heavy-duty use.
  • Direct Fit Design: Engineered for 2003-2009 Dodge Ram 2500/3500 with 5.9L/6.7L Cummins engines.

Ensure the reliability and longevity of your Cummins transmission. Choose the Mishimoto Transmission Cooler for unparalleled heat management.

Upgrade your Cummins cooling system with Mishimoto at GGCRACING.

Vehicle Fitment

Years Make Model Trim
2003 Dodge Ram 2500 Laramie
2003-2009 Dodge Ram 2500 SLT
2003-2009 Dodge Ram 2500 ST
2005-2009 Dodge Ram 2500 Laramie
2006-2007 Dodge Ram 2500 Sport
2006-2007 Dodge Ram 2500 TRX4
2006-2009 Dodge Ram 2500 Power Wagon
2008-2009 Dodge Ram 2500 SXT
2003-2009 Dodge Ram 3500 SLT
2003-2009 Dodge Ram 3500 ST
2006-2007 Dodge Ram 3500 Sport
2007 Dodge Ram 3500 TRX4
2008-2009 Dodge Ram 3500 SXT

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