JK Re-Gearing Packages

Trail Jeeps specializes in driveline and differential upgrades, and we strongly recommend regearing your JK Wrangler for anything taller than a 37 inch tire. The 8 speed automatic and 6 speed manual do a great job of compensating for a larger tire, but you'll still want to regear for a 37 inch tire regardless if you're Jeep is powered by the 3.6 Pentastar, 2.0 Turbo, 3.0 Ecodiesel (Rest In Peace!) or 392 in order to get it right. You paid a lot for your fancy new Jeep, why skip gearing and ruin the highway performance? When you regear, you are increasing the engine and transmission's leverage on the tires, getting precious torque back that is lost with the addition of larger tires, keeps your transmission in its proper gears at highway speeds, and drastically decreases wear on engine and driveline components. As an added bonus, a JK on 37s that has been geared properly experiences minimum fuel economy loss, that translates into real increase in range and reduces money spent at the pump.

Trail Jeeps likes to regear to 5.13 for a 37 or 38 inch tire for JKs with the 3.6, especially when pulling a trailer or regularly driving into the mountains. For manual transmissions, 3.0 Ecodiesels, 2.0 Turbos, 392s or Jeeps that see a lot of highway driving on flatter roads, a 4.88 gear is also a consideration and can provide additional fuel economy if driven for long distances. You may want to consider a 4.56 for you guys that are still rolling with the Ecodiesel, although the difference between 4.56 and 4.88 is negligible.

For our gears, Trail Jeeps sticks with Revolution Gear and Axle exclusively for reliable, quiet operation, predictable installation characteristics, and for their solid warranty policy. It is also worth nothing that Revolution Gear and Axle is an American, veteran owned company, who we have had an awesome relationship with for years. Their gears are cut in South Korea, which is the place to go for OE quality gears. Watch out for gears made in China.

Here's more info from Revolution Gear and Axle on their gears:

Gear Packages from Revolution Gear and Axle include Front and Rear Ring and Pinion Gear Sets and Master Install Bearing Kits.

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.

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.

Key Benefits:

Enhanced Capability and Performance: The optimized gear ratio improves wheel torque delivery, 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 hauling a trailer or carrying gear for your next adventure.

Increased Fuel Efficiency at Highway Speeds: Contrary to what one might expect, the correct 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 its commitment to quality. Our 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 performs exceptionally and 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 rings 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 whines often associated with aftermarket gear sets.

Upgrading the Ring and Pinion set by Revolution Gear and Axle is more than just a modification; it's an investment in your vehicle's performance, efficiency, and enjoyment.

Compatible Vehicles: JK/JKU (all-trims)

Gear ratios: 4.10, 4.56, 4.88, 5.13, 5.38

With this re-gearing package through Trail Jeeps, any of these gear ratios can be installed at one flat rate, which is $3250.