Yukon Gear Hardcore Locking Hub Set For Dana 44 GM and Ford Half and Three Quarter Ton 19 Spline

Yukon Hardcore Locking Hub Set for Dana 44 in 1978 and Down GM and 1978-1992 Ford, 19 Spline, Part YHC70006

The Yukon Gear YHC70006 Hardcore Locking Hub set delivers all-steel manual hub engagement for Dana 44 front differentials found in 1978 and earlier GM half and three-quarter ton trucks as well as 1978-1992 Ford Bronco, F-150, and F-250 Dana 44 applications. The YHC70006 features Chrome-Moly internal gears, a low-profile all-steel bezel, and a proprietary friction-reducing coating that extends service life in demanding off-road and towing use. The hub defaults to locked during use and engages or disengages in just one-third of a turn. A Limited Lifetime warranty is included against manufacturer defects.

Features and Benefits

• Fits 1978 and earlier GM Dana 44 front differentials and 1978-1992 Ford F-150, F-250, and Bronco Dana 44 front, 19 spline
• All-steel outer construction with Chrome-Moly internal gears for maximum torque capacity
• Defaults to locked position during use, preventing accidental disengagement on the trail
• One-third turn engagement from locked to free for quick 2WD to 4WD transitions
• Low-profile bezel reduces risk of impact damage over rocks and obstacles
• Proprietary coating on locking gears reduces friction and extends service life
• Compatible with YA WU-01 and YA WU-02 Spin Free applications; includes 2.5mm spacers
• Does NOT work with Stage-8 lock nuts
• Limited Lifetime warranty against manufacturer defects

Vehicle Fitment

Specifications

What's Included

• Two Yukon Hardcore Locking Hubs (driver and passenger)
• 2.5mm spacers for spin-free hub applications
• All mounting hardware

Frequently Asked Questions

What differentials does the YHC70006 fit?
The YHC70006 fits Dana 44 front differentials in 1978 and earlier GM half and three-quarter ton 4WD trucks and 1978-1992 Ford Bronco, F-150, and F-250 models with 19 spline front axle shafts.

How do I verify my spline count before ordering YHC70006?
Remove one front hub and count the splines on the outer axle stub shaft end. If you count 19 splines, the YHC70006 is the correct fit. The 30-spline version is YHC70005.

Can the YHC70006 be used with Stage-8 lock nuts?
No. The YHC70006 is not compatible with Stage-8 lock nut systems. Standard spindle nut configurations are required.

Will installing the YHC70006 void my factory warranty under the Magnuson-Moss Warranty Act?
The Magnuson-Moss Warranty Act prohibits a vehicle manufacturer from voiding your warranty solely because an aftermarket part was installed. The manufacturer must demonstrate the YHC70006 caused the specific failure in question.

What warranty does Yukon cover on the YHC70006?
Yukon provides a Limited Lifetime warranty against manufacturing defects on the YHC70006.

Does the YHC70006 fit spin-free hub conversion kits?
Yes. The YHC70006 is compatible with Yukon YA WU-01 and YA WU-02 spin-free applications and includes 2.5mm spacers for proper fitment.

What is the advantage of Chrome-Moly internals over standard steel?
Chrome-Moly alloy provides higher tensile strength and better fatigue resistance under repeated high-torque cycling, making it well suited for rock crawling, trail driving, and heavy towing applications.

How many turns does it take to engage the YHC70006?
Only one-third of a turn of the all-steel low-profile bezel is required to go from fully disengaged to fully engaged, making transitions fast even with gloved hands.

Installation Instructions

1. Raise and support the front of the vehicle on jack stands and remove the front wheels.
2. Remove the existing locking or free-wheeling hubs by extracting the face retaining screws.
3. Clean the spindle end and axle stub shaft thoroughly and inspect for wear.
4. Verify 19-spline count on the stub shaft before proceeding with YHC70006 installation.
5. If using a spin-free conversion, install the 2.5mm spacers included with the YHC70006 per the kit instructions.
6. Thread the spindle nut onto the spindle and torque to the vehicle service manual specification.
7. Slide the inner hub body onto the stub shaft splines and seat it fully.
8. Install the retaining snap ring or clip to secure the inner body.
9. Place the outer hub cap assembly over the inner body and fasten the retaining screws to specification.
10. Repeat on the opposite side, reinstall wheels, and road-test in both 2WD and 4WD.