Thinking about buying a Dodge Cummins? From classic first-gens to modern powerhouses, this guide covers what you need to know about each of the five generations of Dodge Cummins to help you make the right choice.

First Generation (1989-1993)

The first generation (1989-1993) featured a consistent 160 horsepower across all models. Bobby J noted that “160 horsepower was standard for all models.”

Early models (1989-1991) used a non-intercooler system with the 727 TorqueFlite 3-speed transmission, while later models (1991.5-1993) upgraded to the 518 transmissions.

These trucks employed a Dana 60 front axle, which Bobby J identified as “nearly identical to the Chevy square body Dana 60.” He also suggested that “a simple governor spring and fuel pin really wakes up a rotary VE engine.”

Second Generation (1994-2002)

The second generation was divided into two eras. The early period (1994-1998), according to Booby J, had a horsepower range of “160 to 188 for automatics and 175 to 215 for manual transmissions.”

Bobby J called the 12-valve engine “one of its best assets” due to its reliability and noted they were “easy to make power.” These trucks, however, also presented issues like the killer dowel pin.

The later period (1998.5-2002) witnessed improvements in towing performance and comfort. The VP44 injection pump appeared, and horsepower reached up to 245 in the “HO” models.

Bobby J stated that “a late 01-02 truck will outperform a 95-96 big time” due to improvements like hydro boosts and rear disc brakes.

Third Generation (2003-2009)

The third generation brought in some massive changes. Early models (2003-early 2004) produced 235 horsepower. Later models (mid-2004-2007) saw horsepower increase, with the 6.7-liter engine reaching 350 horsepower.

Emissions equipment also began to appear. Bobby J considered the 03-04 trucks “extremely simple” with basically no emissions equipment. He also remarked that “the addition of a Smarty really wakes these trucks up.”

While these trucks offered a good balance, they were more challenging to work on under the hood and presented some HVAC issues. As Bobby J advised, when buying a third-gen, “you have to make a decision…do you want a post-emissions truck or a pre-emissions truck?”

Fourth Generation Ram (2010-2018)

The fourth generation featured an entirely new redesign (and RAM’s stand-alone branding, as trucks were no longer under Dodge). Power numbers increased, with the HO engine achieving 385 horsepower and 930 lb-ft of torque.

DEF fluid was also introduced in 2013. Bobby J observed the 4th gen as “overall how much different it looks both on the inside and the outside.”

He also highlighted the big jump in comfort and technology. Even if these trucks are more challenging to work on compared to the earlier version, the fourth generation of Dodge Cummins offered a smooth ride thanks to the radius arm suspension.

Fifth Generation RAM (2019-2022)

And lastly, the fifth generation. It showcased a new front clip, an upgraded interior with a 12-inch screen, and a quieter engine.

When it comes to power, horsepower reached 420 in HO models. Bobby J described the interior as “extremely nice,” comparing it favorably to a Cadillac Escalade. He emphasized the sheer towing capabilities and Max Tow ratings.

While these trucks offered ultimate comfort and capability, they experienced some issues with the CP4 pump and AS69RC failures.

Choosing the right Ram depends on your needs. This overview of all five generations provides what you need to know to help you choose the right Cummins for your needs!