Yukon Gear & Install Kit For Jeep JK Rubicon 5.13 Ratio

Yukon Gear and Install Kit Package for Jeep JK Rubicon, Dana 44 Front and Rear, 5.13 Ratio

The YGK016 is a complete re-gear solution for 2007 through 2018 Jeep Wrangler JK Rubicon models with Dana 44 front and rear axles. This YGK016 kit delivers front and rear 5.13 ratio ring and pinion gear sets paired with full master overhaul kits in a single package. The 5.13 ratio makes the YGK016 the ideal choice for Rubicon owners running 37-inch or larger tires who need to fully recover low-end torque, crawl performance, and highway cruising RPM. All ring and pinion sets are forged from 8620 triple-alloy steel, precision heat treated, and tested to Yukon's exacting surface finish standards. The Y.E.S. Plan provides comprehensive lifetime protection for the YGK016 gear set kit for as long as you own the vehicle.

Features and Benefits

• Rubicon Dana 44 Specific Engineering - Dimensioned for the unique high-pinion Dana 44 front and standard Dana 44 rear of the JK Rubicon, not interchangeable with non-Rubicon axle sets.
• 5.13 Gear Ratio for Large Tires - Best suited for 37 to 40-inch or larger tires to fully restore the factory driving experience and rock-crawling capability.
• Front and Rear Master Overhaul Kits Included - Complete Timken-quality bearing and seal sets for both differentials eliminate the need for additional parts sourcing.
• 8620 Alloy Steel Gears - Computer-controlled forging and advanced heat treatment provide high tensile strength, surface hardness, and core toughness.
• Leading-Edge Quality Testing - Yukon's engineering processes include in-house testing to confirm structure and surface finish meet exacting specifications.
• Y.E.S. Plan Lifetime Coverage - No-questions-asked lifetime protection plan that travels with the gear kit for as long as you own the vehicle.
• One-Year Manufacturer Warranty - Standard defect coverage on all components in the YGK016 kit.

Vehicle Fitment

Specifications

What is Included

• Front Dana 44 high-pinion ring and pinion gear set, 5.13 ratio
• Rear Dana 44 ring and pinion gear set, 5.13 ratio
• Front master overhaul kit with Timken bearings, races, seals, and shims
• Rear master overhaul kit with Timken bearings, races, seals, and shims

Frequently Asked Questions

• Q: What size tires are 5.13 gears best suited for?
  A: The YGK016 5.13 ratio is optimized for 37-inch and larger tires. For 35 to 37-inch tires, the 4.88 kit YGK015 may be a better match.
• Q: Does the YGK016 fit the 2014 Wrangler Rubicon?
  A: Yes. The 2014 Wrangler Unlimited Rubicon uses the same Dana 44 axle assemblies and is compatible with the YGK016 kit.
• Q: Will this kit work with the Rubicon factory factory air locker?
  A: Yes. The YGK016 ring and pinion sets are compatible with the Rubicon's factory air-actuated locker carriers on both front and rear axles.
• Q: What is included in the master overhaul kit?
  A: The overhaul kits contain pinion and carrier bearings, races, pinion seal, shims, crush sleeve, and all small hardware needed to complete each differential rebuild.
• Q: Is professional installation recommended?
  A: Yes. Ring and pinion installation requires precise measurement of backlash and preload. Yukon recommends professional installation by a drivetrain specialist to ensure longevity and to maintain warranty coverage.
• Q: Does the Y.E.S. Plan comply with the Magnuson-Moss Warranty Act?
  A: Yes. The Y.E.S. Plan is provided in writing with the YGK016 kit, in full compliance with the Magnuson-Moss Warranty Act. Coverage is not conditioned on using a particular dealer or installer.
• Q: How many miles should I run before changing the gear oil after installation?
  A: Yukon recommends changing the gear oil after the first 500 miles to remove metal particles from the gear break-in process before returning to normal service intervals.
• Q: Does the pinion spline count change with the 5.13 ratio?
  A: Yes. The Dana 44 5.13 ratio uses a thick ring gear design with a 24-spline pinion. Verify your carrier and pinion nut socket size before beginning installation.

Installation Overview

1. Drain both differentials and remove the covers, axle shafts, and carrier assemblies.
2. Mark and remove carrier bearing caps, noting all shim locations and thicknesses for reference.
3. Press new carrier bearings from the YGK016 master kits onto the carrier bores using a press.
4. Install the new ring gear using thread-locking compound and factory torque specifications.
5. Set pinion depth with marking compound, installing pinion with new bearings and shim stack from the master kit.
6. Install a new crush sleeve and set pinion bearing preload to spec using an inch-pound torque wrench on the pinion nut.
7. Set backlash to 0.006 to 0.010 inch for Dana 44 using side bearing shims and a dial indicator.
8. Verify the gear contact pattern is centered and acceptable before final assembly.
9. Reinstall covers with sealant, fill with gear oil, and perform a 500-mile break-in before hard use.
10. Repeat for the second axle and road-test for noise or vibration before returning to full service.

California Proposition 65 Warning: This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.