Yukon Gear & Install Kit Package For Jeep JK Non-Rubicon in a 4.11 Ratio

Complete Front and Rear Re-Gear Kit for 2007-2018 Jeep JK Non-Rubicon, Part YGK055

The Yukon Gear YGK055 gear and install kit package delivers everything needed to re-gear a Jeep JK Non-Rubicon in a single part number. Covering both the front Dana 30 and the rear Dana 44 axle assemblies found in the non-Rubicon JK, this kit pairs high-performance ring and pinion sets with Yukon Master Overhaul hardware to ensure a complete, professional-grade installation. Whether you are upgrading to larger tires, improving crawl ratios, or restoring worn drivetrain components, the YGK055 eliminates the guesswork and sourcing delays of a piecemeal re-gear.

Features and Benefits

• Engineered specifically for 2007-2018 Jeep Wrangler JK non-Rubicon applications with Dana 30 front and Dana 44 rear differentials
• 4.11 ring and pinion ratio optimized for 33-35 inch tire setups
• Ring and pinion sets forged from 8620 steel with vacuum heat treatment and CNC machining for consistent tooth geometry
• Master Overhaul kits include all bearings, races, seals, shims, and installation hardware for both axles
• State-of-the-art computer-controlled lapping ensures quiet operation and long service life
• Yukon Y.E.S. Plan provides lifetime warranty coverage on the gear set for as long as you own the vehicle
• Front and rear components bundled under one part number to simplify ordering
• Made in USA

Vehicle Fitment

Specifications

What's Included

• Front ring and pinion gear set (Dana 30, 4.11 ratio)
• Rear ring and pinion gear set (Dana 44, 4.11 ratio)
• Front Yukon Master Overhaul Kit (bearings, races, seals, shims)
• Rear Yukon Master Overhaul Kit (bearings, races, seals, shims)

Frequently Asked Questions

What vehicles does the YGK055 fit?
The YGK055 fits 2007-2018 Jeep Wrangler JK models equipped with the Dana 30 front and Dana 44 rear differentials. This applies to Sport, Sahara, and Unlimited variants that are non-Rubicon.

What is the 4.11 ratio best suited for?
A 4.11 gear ratio works well with 33-35 inch tires, restoring factory-equivalent RPM and torque multiplication lost when moving to larger tires.

Does this kit include the installation hardware?
Yes. The YGK055 includes complete Yukon Master Overhaul Kits for both the front and rear axles, covering all bearings, races, seals, and shim packs needed for a full re-gear.

Will this kit affect my factory warranty under the Magnuson-Moss Warranty Act?
Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your vehicle warranty simply because you installed an aftermarket part. The YGK055 is an OEM-quality component and should not void unrelated warranty coverage. Consult your dealer for specifics.

What warranty does Yukon provide on the YGK055?
Yukon covers this gear set under their Y.E.S. Plan, a lifetime comprehensive warranty against defects for as long as you own the vehicle.

Do I need any special tools to install this kit?
A ring and pinion installation requires a press, dial indicator, and bearing driver set. Professional installation is strongly recommended.

Can I run this ratio with 37 inch tires?
A 4.11 ratio is usable with 37 inch tires but will result in slightly higher RPM at highway speeds. A 4.56 ratio is generally preferred for 37 inch tires.

Is a limited-slip or locker required when re-gearing?
No, but it is recommended that both front and rear differentials are re-geared simultaneously to maintain matching ratios across axles.

Installation Instructions

1. Raise the vehicle on a lift and support it safely with jack stands.
2. Drain the differential fluid from both front and rear axle housings.
3. Remove the driveshafts from both front and rear axles.
4. Disassemble the rear Dana 44 differential: remove the carrier, ring gear, and pinion.
5. Press bearings off the old carrier and pinion using a bearing press.
6. Install new bearings from the Master Overhaul Kit onto the new pinion and carrier.
7. Set pinion depth using the included shims and a dial indicator.
8. Install the new Dana 44 ring and pinion from the YGK055 and set backlash to 0.005-0.010 in.
9. Check contact pattern with gear marking compound and adjust shims as needed.
10. Repeat the ring and pinion replacement process on the front Dana 30.
11. Reinstall all cover gaskets and hardware; torque to manufacturer specification.
12. Refill both differentials with the appropriate gear oil.
13. Reinstall driveshafts and road-test the vehicle.

Prop 65 Warning: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.