Axle and Differential

2010-2018 Dodge Ram 2500 & 3500 6.7L Cummins Axle & Differential Parts

Strengthen your truck's driveline, lower fluid operating temperatures under heavy towing loads, and confidently deliver high-torque common-rail power to the ground with premium 2010–2018 6.7L Cummins 4th Gen axle and differential parts from Full Force Diesel. The 4th Gen Ram Heavy Duty trucks are legendary workhorses, but adding electronic tuning, aggressive fueling upgrades, or oversized off-road tires places intense mechanical stress on the factory drivetrain. Upgrading your differentials with heavy-duty aftermarket components is the most effective way to eliminate gear deflection, prevent axle shaft fatigue, and avoid catastrophic failures on the road or trail.

Understanding Your 4th Gen Ram AAM Axle Configuration

During the 2010–2018 production run, Ram equipped these trucks with robust American Axle and Manufacturing (AAM) axle platforms. However, several critical mid-generation design changes mean verifying your specific suspension and axle setup is essential before ordering parts:

• Front Axle Assembly: These trucks utilize an AAM 9.25" front axle featuring a 12-bolt cover. For the 2010–2013 model years, Ram used a traditional front coordinate steering geometry with standard universal joints. In 2014, Ram updated the 2500/3500 front radius arm suspension, introducing a front axle disconnect (FAD) system on select models to improve fuel efficiency, which alters front axle shaft compatibility.

• Rear Axle Sizes: Depending on your model year, transmission option (68RFE vs. high-output Aisin), and whether your truck is a single-rear-wheel (SRW) or dual-rear-wheel (DRW) configuration, your truck came equipped with either the standard AAM 11.5" rear axle or the larger AAM 11.8" rear axle (introduced in 2013 for High Output models). Furthermore, the switch from rear leaf springs to rear coil springs (2500 models in 2014) or factory rear air suspension changes rear differential cover clearance requirements.

Core Upgrades to Prevent Driveline Failures

Whether you are building a dedicated towing rig or a high-horsepower street truck, investing in heavy-duty differential upgrades preserves your 4th Gen's reliability:

• High-Capacity Differential Covers: Swapping out thin, stamped-steel factory covers for heavy-duty cast aluminum covers from industry-leading brands like Mag-Hytec, PPE, or BD Diesel increases gear oil capacity. Cast cooling fins rapidly dissipate fluid heat to maintain viscosity, while integrated high-power neodymium magnets pull harmful ferrous wear particles out of the oil before they can score your bearings.

• Ring & Pinion Re-Gearing: Running 35-inch or 37-inch tires changes your truck's effective gear ratio, forcing the engine and transmission to labor harder. Re-gearing your front and rear differentials with premium ring and pinion sets (such as Yukon Gear & Axle) restores your optimal RPM powerband, brings back lost towing torque, and reduces wear on your transmission.

• Lockers & Master Overhaul Kits: For maximum traction in mud, snow, or demanding work environments, upgrading to a limited-slip unit or a selectable locker delivers equal, positive power to both wheels. When performing a gear swap, always use a complete master overhaul kit loaded with premium Timken bearings and high-quality seals to guarantee a quiet, long-lasting install.

At Full Force Diesel, we remove the guesswork from upgrading your 4th Gen Ram drivetrain. Explore our 2010–2018 6.7L Cummins axle shafts, differential covers, ring and pinion sets, and synthetic gear lubricants above to find the exact parts engineered for your truck.