Revolution Gear and Axle D44/D30 4.88 Gear Package w/ Timken Bearings

Re-gear your 2007-18 Jeep Wrangler JK with one of our most popular gear packages. Complete your 4x4 Jeep build with parts from the brand that off-roaders have trusted for decades. Our mating Master Install Kits offer a comprehensive bill of material with all the components needed to overhaul your differential ring and pinion gear set.

Gear Package Specifications

Jeep Wrangler JK Gear Package Benefits:

Enhanced Capability and Performance: The optimized gear ratio improves torque delivery to the wheels, allowing for better traction and control. Towing performance is improved when you install the correct gear ratio for your vehicle setup by providing increased torque at lower speeds, making it easier to pull heavy loads without straining the engine. This means smoother, more efficient towing, whether you're hauling a trailer or carrying gear for your next adventure.

Increased Fuel Efficiency at Highway Speeds: Contrary to what one might expect, the right gear ratio can contribute to better fuel efficiency. By optimizing the engine's RPM at highway speeds, the ring and pinion gear set helps maintain a more efficient fuel consumption rate, saving you money and extending your journeys.

Superior Strength and Durability: Revolution Gear and Axle is renowned for their commitment to quality. All ring and pinion gear sets are made from high grade steel using precision gear cutting and heat treatment processes that meet or exceed Original Equipment standards. This results in a product that not only performs exceptionally but also withstands the rigors of both daily driving and extreme off-road conditions.

Easy Installation and Quiet Operation: With over 40 years of manufacturing experience, Revolution Gear and Axle ring and pinions are preferred by installers for smooth and consistent setup. Our gear sets offer quiet operation, ensuring a comfortable ride without the annoying gear whine often associated with aftermarket gear sets.

All Revolution Gear and Axle Ring and Pinion gear sets are backed by a 2 Year Warranty against manufacturing defects. With products that have been Street, Off Road and Race proven, you can count on Revolution Gear and Axle products to be the most trusted in the aftermarket.

A: The 4.88 ratio is ideal for Jeeps running larger tires (typically 33–35 inches), helping restore power and torque lost due to bigger tires and improving overall drivability on and off-road.

A: Timken bearings are renowned for their high quality, long life, and smooth performance, often outperforming factory bearings in durability and resistance to wear.

A: Yes. Proper installation requires precision tools and expertise to ensure correct gear mesh, backlash, and bearing preload for quiet, reliable operation.