Best Transmission Options and Accessories for 6.7 Cummins Diesel Engines
The 6.7 Cummins diesel engine is a powerhouse commonly found in Dodge Ram trucks, requiring specialized transmission parts and accessories for optimal performance. This article highlights some of the best transmission-related products designed to increase durability, cooling efficiency, and fluid maintenance. The selections include transmission oil coolers, filter kits, pans, dipsticks, and complete service kits compatible with various Ram models equipped with the 6.7L Cummins engine.
| Product | Brand | Key Feature |
|---|---|---|
| Mishimoto Automatic Transmission Oil Cooler | Mishimoto | 212% Core Volume Increase for Enhanced Cooling |
| Doc’s Diesel Transmission Filter Kit DF-370 | Doc’s Diesel | Designed for AISIN AS69RC Transmissions, Keeps Transmission Clean |
| Mishimoto Aluminum Transmission Pan | Mishimoto | Durable Cast Aluminum with Increased Fluid Capacity |
| Doc’s Diesel Transmission Filter Kit DF-211 | Doc’s Diesel | Fits 68RFE Transmission, Filters Debris for Smooth Shifting |
| Mishimoto MMTC-RAM-15SL Transmission Cooler | Mishimoto | 112% Core Volume Increase for 2015-2018 Ram 6.7L Cummins |
Mishimoto MMTC-RAM-03SL Transmission Oil Cooler
This Mishimoto transmission oil cooler is engineered specifically for Dodge Ram models between 2003 and 2009 fitted with Cummins 5.9L and 6.7L engines. It significantly improves cooling efficiency by offering a 212% increase in core volume and a 244% rise in fluid capacity compared to stock units. This helps maintain transmission temperatures during heavy-duty and towing applications, reducing wear and enhancing durability. Included in this cooler is a fully serviceable thermostat, providing quick warm-up in colder climates and bypass options for warmer conditions, ensuring the transmission oil is always optimal for performance.
Doc’s Diesel Transmission Filter Kit DF-370 for AISIN AS69RC
Designed for RAM 6.7L Cummins HO 3500, 4500, and 5500 trucks with AISIN AS69RC transmissions from 2013 onward, this Doc’s Diesel filter kit ensures clean transmission fluid by trapping harmful dirt and debris. A clean filter reduces heat and mechanical wear, preventing costly repairs while improving fuel efficiency. The kit replaces Mopar part numbers 68224232AA and 68214914AA, fitting seamlessly for reliable performance and easy maintenance of transmissions in heavy-duty diesel trucks.
Mishimoto Aluminum Transmission Pan 6.7L Cummins
The Mishimoto aluminum transmission pan is a direct fit for Dodge Ram 6.7L Cummins models from 2007.5 and up. Its durable cast-aluminum design boosts the pan’s fluid capacity by 2.6 quarts over the OEM pan, providing enhanced cooling capabilities for the transmission fluid. This addition helps maintain proper transmission temperatures during extended use, reducing the risk of overheating and extending transmission life.
Doc’s Diesel Transmission Filter Kit DF-211 for 68RFE
This Doc’s Diesel filter kit DF-211 is tailored for RAM 6.7L Cummins 2500 and 3500 trucks equipped with the 68RFE transmission and 4WD, covering years 2007.5 to 2025. By capturing debris that damages internal components like torque converters and fluid pumps, the filter helps maintain smooth shifting and reduces heat buildup. It replaces Mopar part 5013470AC and compatible aftermarket filters like Wix WL10394 and Premium Guard PT1271. Proper filtration also aids in fuel efficiency and prolongs transmission service intervals.
Mishimoto MMTC-RAM-15SL Transmission Cooler for 2015-2018 Ram 6.7L
The Mishimoto MMTC-RAM-15SL transmission cooler offers a direct fit solution for 2015-2018 Ram trucks with the 6.7L Cummins engine. It features a 112% increase in core volume and a 237% increase in external fin area compared to the factory cooler, significantly enhancing heat dissipation capabilities. This cooler is ideal for users who engage in heavy towing or extended high-load operations, ensuring consistent transmission performance by preventing overheating and fluid breakdown.
Buying Guide for 6.7 Cummins Transmission Components
Choosing the right transmission components for a 6.7 Cummins engine depends on various factors to ensure longevity, efficiency, and performance. Here are key considerations:
Compatibility and Fitment
Always verify the product’s compatibility with your specific truck model year and transmission type (e.g., AISIN AS69RC or 68RFE). Using parts designed for your configuration improves installation ease and reliability.
Cooling Performance
Upgraded transmission oil coolers and pans with larger capacity and enhanced core volume provide better heat management. Optimal cooling prevents transmission fluid degradation and overheating during towing or heavy-duty usage.
Filtration Efficiency
High-quality transmission filters trap abrasive particles, protecting internal components such as torque converters and pumps. Clean fluid reduces wear and tear, minimizes heat, and improves shifting smoothness.
Material and Durability
Construction materials like cast aluminum offer superior strength and thermal properties compared to stock steel pans. Durable parts withstand high temperatures and physical impacts better.
Maintenance and Serviceability
Parts featuring serviceable components, like thermostats in coolers or spin-on filters in kits, simplify routine maintenance. Quick warm-up features can be advantageous in cold climates, while bypass options help in hot environments.
Additional Accessories
Transmission fluid dipsticks and service kits help monitor fluid levels and perform maintenance efficiently. Replacing these parts regularly ensures accurate diagnostics and extends transmission life.
Considering these aspects will help you select transmission products that maximize the 6.7 Cummins engine’s performance, reliability, and durability.