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What kind of transmission fluid does a 6.7 Cummins take?

The 6.7 Cummins diesel engine, commonly found in Dodge Ram trucks, requires a specific type of transmission fluid. The recommended transmission fluid for a 6.7 Cummins is Mopar ATF+4 or an equivalent Dexron VI/Mercon LV automatic transmission fluid.


Transmission Fluid for the 6.7 Cummins Engine


The 6.7 Cummins engine is a powerful turbocharged diesel engine used in Dodge Ram trucks. This engine is paired with an automatic transmission, which requires a specific type of transmission fluid to function properly. The recommended fluid for the 6.7 Cummins transmission is Mopar ATF+4 or an equivalent Dexron VI/Mercon LV automatic transmission fluid.


Using the correct transmission fluid is crucial for the proper operation and longevity of the transmission. The transmission fluid in a 6.7 Cummins serves several important functions:



  • Lubrication: The fluid helps reduce friction and wear on the transmission components, ensuring smooth and efficient operation.

  • Cooling: The fluid helps dissipate heat generated by the transmission, preventing overheating and damage.

  • Hydraulic Power: The fluid provides the necessary hydraulic pressure to engage the transmission's clutches and gears.

  • Corrosion Protection: The fluid contains additives that help prevent corrosion and rust within the transmission.


Using the wrong type of transmission fluid can lead to a variety of issues, including reduced performance, increased wear and tear, and even complete transmission failure. It's essential to follow the manufacturer's recommendations and use the specified Mopar ATF+4 or equivalent Dexron VI/Mercon LV fluid for the 6.7 Cummins engine.


Changing the Transmission Fluid


In addition to using the correct transmission fluid, it's important to change it at the recommended intervals. For the 6.7 Cummins engine, Mopar recommends changing the transmission fluid every 30,000 miles or 24 months, whichever comes first. This helps ensure the fluid maintains its lubricating and protective properties, extending the life of the transmission.


When changing the transmission fluid, it's best to have the work done by a qualified mechanic or at a reputable service center. They will have the necessary equipment and expertise to properly drain the old fluid, flush the system, and refill it with the correct amount and type of new fluid.

How many quarts does a 6.7 Cummins transmission take?


2019 – Present 6.7L Cummins: 10 quarts (9.5 liters) with filter change.



What transmission fluid does the Ram 3500 take?


The recommended ATF type used in the Chrysler 68RFE or 66RFE Ram 3500 6 speed transmissions is the ATF+4 specification fluid.



What kind of ATF does Dodge use?


This correct Dodge Charger transmission fluid can be identified as ZF 8 & 9 Speed ATF Automatic Transmission Fluid or equivalent, also known as Chrysler Mopar ATF part numbers 68218925AA, 68218925AB, 68339073AA, 668157995AA, or 68157995AB OEM part numbers.



What is the best transmission fluid for a 6.7 Cummins?


Mercon LV is the recommended fill, and it's a good idea to stick with it. There's nothing else out there that performs better, so little reason to stray from the Motorcraft offering.



What happens if you use the wrong ATF fluid?


Immediately after putting the wrong transmission fluid in your vehicle, you can start noticing issues while driving. In most cases, people notice strange noises, overheating, and slipping gears. Do not ignore these warning signs, because they will not go away on their own.



How often do you change the transmission fluid in a Ram 2500 diesel?


Service automatic transmission every 60,000 or 30,000 miles under severe use, as specified in the RAM 2500 diesel maintenance schedule. Service front and rear axle fluids for intensive use every 60,000 or 30,000 miles.



Is it OK to mix ATF fluids?


Is it OK to mix synthetic ATF with a conventional and/or synthetic blend ATF? Yes. Synthetic ATF and conventional fluids are 100 percent compatible with each other.



What kind of transmission fluid does a Dodge Ram 2500 diesel take?


The correct Ram 2500 transmission fluid can be identified as Mopar ZF 8&9 Speed ATF or equivalent, also known by Chrysler Mopar 68218925AA, 68218925AB, 68339073AA, 668157995AA, or 68157995AB transmission fluid part numbers.



What color is Dodge Ram transmission fluid?


dark red
At Allen Samuels Dodge Chrysler Jeep Ram FIAT, we frequently encounter the question, “What color is transmission fluid?” This critical fluid is deliberately dyed for easy identification. When fresh, it boasts a translucent, dark red hue.



Does it matter what type of ATF you put in your transmission?


So unless you're driving a car that's pushing 40, this isn't the type of ATF for you. Choosing the correct transmission fluid is critical to insuring the maximum performance and fuel economy from your car. Always check your owner's manual for the type of fluid recommended for your vehicle by the manufacturer.


Kevin's Auto

Kevin Bennett

Company Owner

Kevin Bennet is the founder and owner of Kevin's Autos, a leading automotive service provider in Australia. With a deep commitment to customer satisfaction and years of industry expertise, Kevin uses his blog to answer the most common questions posed by his customers. From maintenance tips to troubleshooting advice, Kevin's articles are designed to empower drivers with the knowledge they need to keep their vehicles running smoothly and safely.