Diesel truck news in 2025 was dominated by major recalls, emissions legality crackdowns, and high-stakes performance testing from Ford, Chevy, and Ram. From Cummins engine changes to transmission updates and real-world dyno and drag race results, these top Diesel Army stories highlight the most important diesel industry developments of the year.
Top 10 DIESEL ARMY Stories Of 2025

Ford Recalls 295,449 6.7L Diesel Super Duty Trucks Over CP4 Issue
Ford issued a massive recall affecting nearly 300,000 Super Duty trucks equipped with the 6.7L Power Stroke. The recall centers on potential CP4 high-pressure fuel pump failures that could lead to power loss or engine damage, reigniting long-standing diesel reliability concerns.

Is Deleting A Diesel Legal In 2025? Industry Experts Weigh In
As enforcement tightens nationwide, industry experts break down diesel emissions laws in 2025, including federal regulations, state-level penalties, and common misconceptions. The article provides clarity for diesel owners navigating an increasingly stringent compliance environment.

Expert Warns Of Major Flaws In Ford And GM 10-Speed Transmissions
A transmission expert raises concerns about Ford and GM’s 10-speed automatic transmissions, citing durability and calibration issues. The article examines reported failures, real-world complaints, and whether these advanced transmissions meet the expectations of heavy-duty applications.

New Cummins Engine Drops Grid Heater, Standard-Output
Cummins eliminates the traditional grid heater from its latest standard-output diesel engine. Engineers explain how updated intake design and cold-start strategies replace the aging system, signaling a major shift in diesel cold-weather technology.

Who’s Lying About Horsepower? Ford Versus Chevy Versus Ram Dyno Shootout
Advertised horsepower numbers are put to the test in a head-to-head diesel dyno shootout. The results reveal surprising differences between factory claims and real-world output, fueling debate over diesel performance marketing.

Is The Diesel Ford Excursion Making A Comeback After 20 Years Gone?
Rumors of a diesel Ford Excursion revival spark debate among enthusiasts. This feature analyzes current SUV trends, market demand, and Ford’s heavy-duty lineup to determine whether the iconic diesel SUV could realistically return.

All About The 2025 Ram Heavy Duty’s New Tranny: PowerLine ZF8
Ram replaces the Aisin transmission with the new PowerLine ZF 8-speed automatic for 2025. The article explains improved towing performance, drivability gains, and what the change means for Cummins-powered Ram trucks.

Manual Cummins-Swapped Land Rover Defender Restomod Turns Heads
A classic Defender receives a manual-transmission Cummins diesel swap, blending vintage off-road styling with modern torque. The build highlights craftsmanship, creativity, and the growing popularity of diesel restomods.

Why You Should NOT Emissions Delete Your Diesel Truck
This editorial outlines the legal, financial, and reliability risks of emissions deletion. With enforcement increasing nationwide, diesel owners are urged to consider the long-term consequences before removing factory emissions systems.

2025 Ford Versus Chevy Versus Ram Diesel Drag Race: Unexpected Results
Three 2025 heavy-duty diesel trucks face off in a drag race that delivers unexpected results. Factors like traction, weight, and power delivery explain how the competition unfolded and which truck came out on top.
Look for big diesel news to unfold in 2026.
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