REPORT: 2025 Ram HD To Get Rid Of Standard Output Cummins Turbo Diesel

Last week, we shared an update that caught the attention of many in the automotive industry: Ram Trucks is set to upgrade the transmissions in its 2025 Cummins Turbo Diesel-powered Ram Heavy Duty models. The introduction of the ZF Powerline 8-speed automatic transmission is poised to replace the older 68RFE and Aisin AS69RC 6-speed automatic transmissions, heralding a significant shift in how these trucks will perform.

Understanding the ZF Powerline 8-speed Transmission

Our article on the ZF Powerline 8-speed has generated discussions, particularly around its maximum torque rating of 1,000 pound-feet. It’s crucial to note, however, that this figure is derived from commercial applications involving vehicles with a Gross Combined Weight Rating (GCWR) of up to 57,000 lbs. When applied to a heavy-duty truck context, such as the Ram Heavy Duty pickups, this transmission is likely to achieve a higher torque rating, especially given that the maximum GCWR for a Ram 3500 pickup is currently 45,000 lbs.

There’s also speculation that Ram could commission a bespoke version of the ZF transmission, tailored with enhanced internals and friction materials to further increase its torque capacity. Given the variety of ZF 8-speed automatic transmissions available, each designed to handle different torque levels, it’s entirely feasible that Ram could secure a version optimized for their specific requirements.

The Current Ram Heavy Duty Lineup

At present, the Ram 2500 and 3500 models offer different levels of power with the 6.7 Cummins engines. The standard output version available in the 2500 models delivers 370 hp and 850 pound-feet of torque, while  3500 models are available with the standard output version or the high output version with 420 hp and 1,075 pound-feet of torque. Both are significant figures, showcasing Ram’s commitment to providing robust powertrains for their heavy-duty trucks.

Looking Ahead: The 2025 Cummins Turbo Diesel

Insiders report that for 2025, Ram plans to simplify its heavy-duty truck offerings by providing a single Cummins Turbo Diesel option, made possible by the new transmission’s capabilities. Expectations are high that this engine will surpass the performance metrics of the current high-output variant, promising more power and torque for Ram enthusiasts. This would also mean that, finally, you wouldn’t have to step up to a 3500 to get the most powerful version of the Cummins Turbo Diesel. 

Notably, Ram has a history of pushing the envelope in diesel performance, having been the first to exceed 1,000 pound-feet of torque with the 2019 Ram 3500 Cummins High Output. The upcoming 2025 models could very well continue this trend, potentially challenging the current heavy-duty horsepower and torque champion, Ford’s Powerstroke High Output, which boasts 500 hp and 1,200 pound-feet of torque.

What’s Next for Ram?

The anticipation for the 2025 Ram Heavy Duty trucks is building. With Ram’s track record of innovation and leadership in the heavy-duty segment, the upcoming models are expected to set new benchmarks in performance, efficiency, and capability. As we await further details, the question on everyone’s mind is whether Ram will reclaim its position at the top of the heavy-duty truck market.

We invite your thoughts and comments below on this exciting development. Stay with us for more updates on the 2025 Ram Heavy Duty news as it unfolds.