Yukon Gear Hardcore Locking Hub Set For Dana 60 / 30 Spline. 99-04 Ford

Yukon Gear Hardcore Locking Hub Set for Dana 60, 30-Spline (YHC70004)

The YHC70004 Hardcore Locking Hub Set from Yukon Gear is engineered specifically for 1999-2004 Ford F-250 and F-350 Super Duty trucks equipped with a Dana 60 front axle and 30-spline stub shafts. YHC70004 replaces factory hubs with an all-steel, chromoly-internals design that defaults to the locked position, keeping you in 4WD engagement when you need it on the trail or job site. With a low-profile bezel and one-third turn operation, this hub set gives Super Duty owners a heavy-duty, reliable alternative to OEM-style units that can wear out under sustained off-road use.

Features and Benefits

• All-steel construction with chromoly internal components for superior strength and long service life
• Defaults to locked position, providing 4WD engagement even without manual actuation
• One-third turn engagement and disengagement for fast, positive operation without tools
• Low-profile bezel profile minimizes trail snag points
• Sold as a complete set of two hubs (driver and passenger)
• Designed for Dana 60 front axle with 30-spline stub shafts on 1999-2004 Ford Super Duty trucks
• Does NOT work with Stage-8 lock nuts
• Limited lifetime warranty from Yukon Gear

Vehicle Fitment

Specifications

What's Included

• 2 x Hardcore locking hubs (driver and passenger side)
• Mounting hardware
• Installation instructions

Frequently Asked Questions

Which Ford Super Duty years does YHC70004 fit?
YHC70004 fits 1999-2004 Ford F-250 and F-350 Super Duty trucks equipped with the Dana 60 front axle and 30-spline stub shafts. Verify your axle spline count before ordering if you have had any prior axle work done.

Can YHC70004 be used with Stage-8 lock nuts?
No. YHC70004 is not compatible with Stage-8 lock nuts. If your vehicle is running Stage-8 lock nuts, this hub set will not fit correctly. Please verify your hardware configuration before purchasing.

What is the difference between YHC70001 and YHC70004?
YHC70001 is the 35-spline version for 1979-1997 GM, Ford, and Dodge applications. YHC70004 is the 30-spline version designed specifically for 1999-2004 Ford Super Duty trucks. Both use the same all-steel, chromoly-internal design, but they are not interchangeable due to spline count differences.

What does it mean that the hub "defaults to locked"?
A hub that defaults to locked is mechanically engaged with the axle shaft at rest. Even if the locking cap is not turned to the locked position manually, the hub maintains a connection with the shaft. This prevents you from accidentally driving in free-wheel mode when you need 4WD.

Will installing YHC70004 void my factory warranty?
Under the Magnuson-Moss Warranty Act, a manufacturer cannot void your warranty solely due to the installation of an aftermarket part like YHC70004, unless they can prove the part caused a specific failure. Consult your dealership with any specific warranty questions.

How difficult is installation?
Hub replacement is a moderate DIY job. It requires removing the wheel, unbolting the existing hub assembly from the rotor hat, sliding the new hub onto the stub shaft splines, and torquing to spec. A basic socket set and torque wrench are sufficient for most applications.

Is a gasket included?
Mounting hardware is included. Refer to the included instructions for any gasket or sealant requirements specific to your application.

What warranty covers YHC70004?
Yukon Gear provides a limited lifetime warranty on YHC70004 against defects in materials and workmanship for the original purchaser.

Installation Instructions

1. Safely lift the front of the vehicle and support it securely on jack stands. Remove the front wheels.
2. Remove the existing hub assembly by unthreading the retaining bolts from the hub cap face and pulling the hub body off the stub shaft.
3. Inspect the stub shaft splines for wear or damage. Clean the splines and hub mounting face, removing any old sealant or gasket material.
4. Confirm your stub shaft is 30-spline before proceeding. Count the splines if there is any doubt about prior axle modifications.
5. Slide the YHC70004 hub body onto the 30-spline stub shaft, aligning the mounting bolt holes with the rotor hat.
6. Thread and torque the mounting bolts to the specified torque (refer to the included instruction sheet for vehicle-specific values; typically 35-40 ft-lbs).
7. Install the locking collar onto the hub body and verify smooth one-third turn engagement and disengagement.
8. Reinstall the wheels and torque lug nuts to specification. Lower the vehicle.
9. With the vehicle on level ground, engage 4WD and test both hubs for positive lock and unlock function before driving.

Proposition 65 Warning: This product can expose you to chemicals including lead, 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.