Yukon Gear Hardcore Locking Hub For Dana 60 / 30 Spline
One locking hub on a one-ton Dana 60 front can fail while the other is still fine: the dial on one side seizes, the hub pops out of lock when you load the axle, or the driver splines round off and that wheel stops pulling. Yukon Gear & Axle part YHC71003 is a single Hardcore locking hub for the 30-spline Dana 60, so you can replace the bad side on a 1975-1993 Dodge W-series, a 1977-1991 Chevy or GMC K30 or K3500, or a Ford with the Dana 60 front without buying a pair.
On these kingpin axles the wheel hub turns on tapered roller bearings on the spindle, and the 30-spline outer axle stub runs through the spindle into the center of the hub. The locking hub decides whether those two are connected. In FREE, the wheel spins on its bearings while the stub, U-joint, front differential and front driveshaft sit still, which saves wear in 2WD. In LOCK, a splined driver slides into mesh with the stub and the hub body so the front axle can pull that wheel. Yukon builds the Hardcore hub with chromoly internals and all-steel construction, designs it to default to the locked position and stay engaged under high torque, and moves it from free to locked with a 1/3 turn of a low-profile steel bezel that sits close to the wheel to avoid catching on rocks and brush.
Lock both hubs, put the transfer case in 4WD, jack one front wheel off the ground and try to turn it by hand. A healthy locked hub will not let the wheel turn independently of the axle. If it spins freely or clicks, pull the hub cap and inspect the driver, the stub splines and the snap ring. Also rule out a broken axle U-joint or stub, which can feel the same from the driver's seat. Our hubs not engaging guide covers the full checklist, and the Dana 44 and Dana 60 manual hub buyer's guide explains the spline and bolt pattern differences.
Yukon's vehicle chart lists this hub for the Dana 60 front on the 1977-1986 Chevy K30, 1987-1988 V30, 1977-1978 GMC K35, 1979-1986 K3500 and 1987 V3500, the 1975-1980 Dodge W200 and W300 and 1981-1993 W250 and W350, and the 1978-1979 Ford F-250 and 1979 F-350. The product notes extend Ford coverage to 1978-1997 F-350 one-tons. Yukon's install sheet limits the Dodge application to trucks with the internal-flange hub. Dana 60 fronts were also built with 35-spline stubs, so count the splines on your outer stub first; a 35-spline axle on these years takes the 35-spline Hardcore set. To replace both sides at once, the 30-spline Hardcore pair covers the same trucks. Not sure? Send us the year and VIN. More axle parts are in hard parts.
Remove the old hub, clean the hub face and the stub, and check the spindle bearing adjustment before anything else, since loose bearings will wreck a new hub. These trucks use the spring retainer that rides on a standard spindle. Yukon's instructions call for checking that axle end float is under 0.200 in., using Loctite 242 on the hub bolts and torquing them to 22 in-lbs, and they say these hubs are not designed for Stage 8 style lock nuts. Put a light coat of grease on the internals, then check that the hub engages and releases fully in both directions. If the spindle journal under the bearings is damaged, the Dana 60 Ford front spindle is listed for the Ford trucks, and a rebuild with the Dana 60 front master overhaul kit takes care of a noisy differential while the front end is apart.
| Brand | Yukon Gear & Axle |
| Part number | YHC71003 |
| Fits | Yukon Gear Hardcore Locking Hub For Dana 60 / 30 Spline |
| Type | Differential Install Kits |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Doing this repair right usually means replacing these at the same time. Same transmission, ships together.
One hub, for one side. Order two, or the 30-spline Hardcore set, if both hubs are worn.
Count the splines on the end of the outer axle stub with the hub removed. This hub fits 30-spline stubs only. A 35-spline axle needs the 35-spline Hardcore hubs.
No. Those trucks use a unit bearing front hub. Yukon makes separate Hardcore hubs for the 1999-2004 Super Duty Dana 60.
Yukon designs the Hardcore hub to default to the locked position and not disengage under high torque, with chromoly internals and all-steel construction.
Yes, the hub only connects one wheel to its own stub. Make sure the other side engages fully and both hubs are locked whenever you are in 4WD.
