is limited-slip under normal conditions. 2010 Power Wagon models (along with other Ram trucks) received larger universal joints but retained the AAM 9.25 front and AAM 10.5 rear axle with a 4.56:1 final drive. For the 2014 model year, with the introduction of the more powerful 6.4L engine, the axle ratio was reduced to 4.10:1. The larger AAM 11.5 rear axle is also introduced for the 2014 model year. In the 2019 model year changes, the Power Wagon retained the AAM 9.25 front axle, AAM 11.5 rear axle, and 4.10:1 gear ratio; however rear axle internals were changed including different axle shafts, differential carrier, and larger 32-spline pinion. 2014 Update The 2014 Ram Power Wagon underwent extensive changes. Starting with 2014 models, the Power Wagon comes standard with the new, larger 6.4L Hemi V8. The transmission and transfer case remain unchanged, but the axle ratio changes from 4.56:1 gear ratio to 4:10 gear ratios. The rear axle is exchanged for the larger 11.5 AAM axle. For 2014 the entire Ram 2500 lineup rear suspension is changed from traditional leaf springs to 5-link coil spring arrangement, and the front suspension has been changed to a radius arm arrangement (3-link) instead of the 5-link previously used. The Power Wagon is equipped with approximately 2" lift over the standard Ram 2500 and is equipped with softer rate springs for off-road performance. Unique to the Power Wagon 3-link front suspension is the "Articulink" front radius arms, which add an extra link and rubber bushing, enabling additional axle articulation. The Power Wagon continues to use Bilstein 4600 shocks. The Power Wagon is equipped with a 5th Bilstein damper, connected to the rear axle to dampen "power hop", a symptom of the 5-link rear suspension during wheel spin. Factory-equipped tires are changed to Goodyear Wrangler Duratrac but remain 33" (285/70R17). The 2014 Power Wagon is available in 3 trim levels: Tradesman, SLT, and Laramie. The Power Wagon Laramie trim was eliminated after 2017. 2019 Update For the 2019 model year, Ram provided a major overhaul of the Heavy Duty lineup. This included a new, fully boxed frame, entirely new front end, and interior updated similar to the DT Ram 1500. However, mechanically the Power Wagon stayed mostly unchanged from the 2018 model year. Notably, it received the ZF 8-speed transmission, over the outgoing Chrysler built 66RFE 6-speed unit. The Power Wagon becomes its own trim level,