Suffering from poor performance and reduced fuel economy resulting from over-sized tires? If you have fitted larger tires to your Jeep then you have likely experienced a loss in performance and fuel economy. Most people also recognize the constant shifting of the transmission as it hunts for a gear that works best with those larger tires. This happens because the larger tires reduce your engine RPMs below the optimal power band. Re-gearing the differentials in your vehicle is the only way to get your vehicle back into its optimal operating RPM range, thus improving performance and reducing strain on your vehicle drivetrain. This is especially important for todays Jeep Wrangler as they feature small displacement engines, with tall factory gearing and overdrive transmissions which are less tolerant to increase in tire size or the weight of added accessories. It is a common misconception that gear changes are Reversed only to hardcore off-roaders or trucks with huge tires. However, re-gearing is one of the single most beneficial modifications you can make to keep the performance, economy, and durability of your daily-driven 4x4. This is a mod for anyone with larger tires, increased weight, or for increased performance on stock vehicles for towing or increased acceleration.
Details:

• 2007-Present Jeep Wrangler JK (Non Rubicon), 4.11 Ratio, Nitro Gear Package Kit
• Front Differential: Dana JK Model 30
• Rear Differential: Dana JK Model 44
• Gear Ratio: 4.11
• Manufacturer: Nitro Gear and Axle
• Warranty: 2 Years
• Sold As A Kit

Nitro Ring and Pinion Features:

• Manufactured in South Korea
• 8620 Steel Gear Forgings
• Precision Machining
• CNC Triple-lapping
• Heat Treatment
• Rockwell Hardness Tested

Gear Package Includes:

• Nitro front ring and pinion
• Nitro front Master Install Kit (Includes Timken and Koyo Bearings)
• Nitro rear ring and pinion
• Nitro rear Master Install Kit (Includes Timken and Koyo Bearings)

Tech Note:

• 3.73 and Up Front Carrier Required
• Models with factory 3.21 gears will also need front carrier NC-D30JK-4 (Sold Separately)
• Dana 30 and Dana 44JK Models are specific to the Wrangler JK. They are not universal
• (Open carriers reuse original internal gears)

Fits Vehicles:

• 2007-Present Jeep Wrangler JK (Non Rubicon)
• 2007-Present Jeep Wrangler JK Unlimited (Non Rubicon)