Yukon Gear Spin Free Locking Hub Conv Kit For Dana 30 & Dana 44 TJ / XJ / YJ / 27 Spline / 5 X 4.5in

Give Your Jeep Cherokee or Wrangler a Dana 30 and Dana 44 Front End That Lasts for the Long Haul

The Yukon Gear Spin Free Locking Hub Conversion Kit YA WU-07 is purpose-designed for Jeep Cherokee XJ, Wrangler YJ and Wrangler TJ owners who are tired of replacing expensive factory unit bearings on their Dana 30 or Dana 44 front axle. YA WU-07 converts your 27-spline front axle to a fully serviceable tapered roller bearing hub system with a 5x4.5 inch bolt circle, paired with Yukon Hardcore premium locking hubs so you can switch between two-wheel and four-wheel drive on demand. Jeep XJ models from 1984 to 2001, YJ Wranglers from 1987 to 1995 and TJ Wranglers from 1997 to 2006 all benefit from the dramatically reduced maintenance costs, improved fuel economy and enhanced drivetrain reliability that YA WU-07 delivers.

Key Features and Benefits

• Converts the factory unit bearing front hub to a fully serviceable tapered roller bearing system, replacing the most expensive recurring maintenance item on XJ, YJ and TJ front axles
• Yukon 4340 Chrome-Moly outer axle shafts replace the factory pieces with significantly stronger 27-spline shafts using Spicer 5-760X U-joints for TJ and XJ applications
• Yukon Hardcore premium locking hubs provide instant selectability between two-wheel and four-wheel drive with a one-quarter turn of the low-profile all-steel bezel
• Fits both Dana 30 and Dana 44 front axle housings on the applicable Jeep models, making it the most versatile Spin Free kit for the TJ, XJ and YJ platform
• 5x4.5 inch bolt circle maintains compatibility with a wide range of factory and aftermarket Jeep wheels
• Timken tapered roller bearings and races included for long-term durability and ease of field service
• Reduces parasitic drivetrain drag compared to constantly spinning unit bearings, yielding better real-world fuel economy
• Backed by a Limited Lifetime Warranty against manufacturer defects
• Note: Some early model housings use the smaller 5-260X U-joint; those applications require new inner axles for compatibility with this kit

Fitment

Specifications

What Is Included

• Two new wheel hub assemblies (one per side)
• Two new spindles (one per side)
• Two Yukon 4340 Chrome-Moly outer axle shafts (27 spline, Spicer 5-760X U-joint compatible)
• Two Yukon Hardcore premium locking hub assemblies
• Timken tapered roller bearings and races (both sides)
• High-quality hub seals
• Spindle nuts and locking hardware
• All necessary installation hardware and instructions

Frequently Asked Questions

Does the YA WU-07 kit fit both the Dana 30 and Dana 44 front axles on my Jeep TJ?

Yes. The YA WU-07 is designed to work with both the Dana 30 and Dana 44 front axle housings found on Jeep Wrangler TJ, Cherokee XJ and Wrangler YJ models. Whether your TJ has the standard Dana 30 or an upgraded Dana 44, this kit will install and function correctly provided the axle is 27-spline and uses the larger Spicer 5-760X style U-joint.

Will the YA WU-07 work on my early Jeep Cherokee XJ with the smaller 5-260X U-joint?

Some early XJ and YJ housings use the smaller Spicer 5-260X U-joint rather than the 5-760X that comes with the YA WU-07 kit. In those cases, you will need to replace the inner axle shafts to use the larger 5-760X U-joint before this kit will be fully compatible. Check your inner axle shaft U-joint size before ordering.

What bolt pattern does the YA WU-07 hub conversion use?

The YA WU-07 uses a 5x4.5 inch bolt circle, which is the factory bolt pattern for Jeep Cherokee XJ, Wrangler YJ and Wrangler TJ models. This maintains full compatibility with factory and most aftermarket wheels designed for these applications without requiring wheel adapters.

How does the Yukon Hardcore locking hub work on the YA WU-07 kit?

The Yukon Hardcore locking hub included with the YA WU-07 engages and disengages the front axle shafts with a one-quarter turn of the low-profile all-steel bezel. When unlocked, the front axle shafts stop spinning and drivetrain drag is significantly reduced, which improves fuel economy during two-wheel drive operation on road.

Can I install the YA WU-07 on a Jeep TJ Rubicon with the Dana 44 front axle?

Yes. The TJ Rubicon uses a Dana 44 front axle, which is one of the two axles this kit supports. The YA WU-07 fits 2003-2006 Jeep Wrangler TJ Rubicon models as long as the factory 27-spline front axle configuration is retained. If you have installed aftermarket 30-spline axle shafts in your Rubicon Dana 44, you will need the YA WU-08 kit instead.

Does the YA WU-07 include brake rotors for my Jeep TJ or Cherokee XJ?

The YA WU-07 does not include brake rotors. The kit replaces the hub, spindle and axle shaft components. Since the front end is completely disassembled during installation, it is a good opportunity to inspect and replace brake rotors and pads if needed. New wheel studs are included with the kit.

Will the YA WU-07 conversion retain my ABS system on a Jeep Cherokee XJ?

No. The YA WU-07 Spin Free kit does not retain the factory ABS wheel speed sensor interface. The conversion changes the hub design from the factory unit bearing style, and ABS functionality will not be preserved. Confirm your ABS compatibility needs before installing this kit.

Is the YA WU-07 hub conversion compatible with a lifted Jeep TJ running large tires?

The YA WU-07 is designed for use with lifted and modified TJ Wranglers as well as stock applications. The 4340 Chrome-Moly outer axle shafts are substantially stronger than the factory pieces and can handle the increased stress of large tires on lifted Jeeps. However, extreme CV axle angles on very heavily lifted trucks may affect axle longevity regardless of shaft material, so maintain reasonable lift heights for daily driving.

Installation Instructions

1. Safely raise and support the front of the vehicle, then remove both front wheels.
2. Remove the brake caliper and hang it from a secure point with wire to avoid brake line strain. Remove the brake rotor if replacing.
3. Remove the front hub dust cap and snap ring if present, then unbolt and remove the factory unit bearing from the steering knuckle, sliding the unit bearing and stub axle out together.
4. Clean the steering knuckle mating face completely and inspect for any cracks or damage before installing new components.
5. Apply anti-seize to the knuckle-to-spindle interface, then install the YA WU-07 spindle onto the knuckle and torque to the values specified in the included instruction sheet.
6. Install the dust shield per the instruction sheet. Press the new Timken bearing races into the hub assembly using a proper bearing race driver until each race is fully seated.
7. Pack the Timken inner bearing with quality wheel bearing grease, install it into the hub and drive in the inner seal.
8. Slide the assembled hub onto the spindle, install the outer bearing, and thread on the inner spindle nut. Set bearing preload per the instruction sheet specification, install the locking tab washer with the pin in a locking hole, then install and torque the outer nut.
9. Press the wheel studs into the hub. Reinstall the brake rotor and caliper.
10. Slide the Yukon 4340 Chrome-Moly outer axle shaft into the knuckle and axle housing, seating the Spicer 5-760X U-joint into the inner shaft correctly.
11. Install the Yukon Hardcore locking hub assembly: install the spring seat, apply grease generously to the outer splines and all ramp surfaces, then seat the spring, spacer and hub body assembly. Install the retaining housing and large circlip, then attach the hub face with tabs aligned in the locked direction.
12. Torque all fasteners per the instruction sheet. Check that the locking hub engages and disengages cleanly through its quarter-turn range before reinstalling the wheel.
13. Repeat the entire procedure on the opposite side. Lower the vehicle, torque lug nuts to specification and perform a careful low-speed test drive before returning to normal use.

WARNING: This product can expose you to chemicals including lead and lead compounds, which are 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.