Yukon Gear Hardcore Drive Flange Kit For Dana 60 / 30 Spline Outer Stubs. Yukon Engraved Caps
If the locking hubs on your one-ton Dana 60 front keep slipping out of LOCK, the dials have seized, or you are tired of getting out in the mud to turn them, a drive flange kit removes the problem entirely. Yukon Gear & Axle YHC50003 is a pair of Hardcore drive flanges for Dana 60 axles with 30-spline outer stubs, with two Yukon-engraved caps and the hardware to bolt them on. It suits older kingpin Dana 60 trucks used for plowing, towing and trail work where the front axle needs to pull every time.
A locking hub is a clutch: a splined driver moves in or out to connect the outer axle stub to the wheel hub. A drive flange has no moving parts. It is a solid steel piece with internal splines that match the 30-spline stub and a bolt flange that fastens straight to the wheel hub, exactly where the lockout used to sit. Once it is on, the stub and the wheel are permanently joined, so the front axle shafts, U-joints, carrier and front driveshaft turn whenever the truck moves. Four-wheel drive is then controlled by the transfer case alone. The trade is simple: you lose the freewheeling that saves wear in 2WD, and you gain a connection that cannot pop out of engagement, cannot be left in FREE by mistake and has no dial to freeze.
With the front wheels off the ground and the transfer case in neutral, lock both hubs and spin one tire: the front driveshaft should rotate with it. If a locked tire spins on its own or clicks, pull that hub and inspect the internal splines. Grab the stub and check for play; a worn stub, spindle bearing or U-joint can feel like a hub problem from the driver's seat, and those parts should be fixed before you bolt on flanges. While the hubs are off, rock the wheel top to bottom to check the wheel bearings and kingpins, since a flange will not cure play in either.
Yukon lists YHC50003 for Dana 60 front axles with 30-spline outer axle stubs. It replaces internal manual locking hubs, the style found on many Ford, GM and Dodge one-ton 4x4s built with the kingpin Dana 60. Yukon notes it will not work on the 1986-1989 Dodge front or on 2005-and-newer Ford Super Duty. Dana 60 fronts were built with both 30- and 35-spline stubs on the same trucks, so pull a hub cap and count the splines before ordering. A 35-spline axle takes the 35-spline Hardcore drive flange kit. If you would rather keep the option of freewheeling, the Hardcore 30-spline locking hub set fits the same stubs. Send us your year and VIN if you want us to check. More Dana 60 parts are in our rebuild kits section.
Because the front driveline now turns full time, keep an eye on front U-joints and the front differential oil level, and run 75W-90 or 75W-140 gear oil as the axle calls for.
| Brand | Yukon Gear & Axle |
| Part number | YHC50003 |
| Fits | Yukon Gear Hardcore Drive Flange Kit For Dana 60 / 30 Spline Outer Stubs. Yukon Engraved Caps |
| 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.
Two Hardcore drive flanges, two Yukon-engraved caps and the hardware needed to mount them in place of the internal manual locking hubs.
No. This kit is for 30-spline outer stubs only. Count the splines on the stub end; 35-spline axles need the 35-spline version of the kit.
No. Yukon states it will not work on 2005-and-newer Ford Super Duty or on the 1986-1989 Dodge front axle.
Yes. The transfer case still selects 2WD or 4WD. The difference is that the front axle and front driveshaft turn all the time, so there is a little more drag and wear on those parts.
Only the cap appearance. This kit has Yukon-engraved caps; the flanges and fitment are the same as the non-engraved 30-spline version.
