Yukon Gear 4340 Chrome-Moly Repl. Outer Stub For Dana 30 / 95+ Wrangler / Uses 5-760X U/Joint
A snapped front stub is one of the most common trail breaks on a Jeep Wrangler TJ, Wrangler YJ or Cherokee XJ, especially once the Jeep is on bigger tires with a locker up front. If one front wheel quit driving after a bang, or the stub splines are rounded where they meet the hub, Yukon Gear & Axle YA W39125 is the replacement: a 4340 chromoly front outer stub, 27 spline, 6.11 inches long, built for the 5-760X series U-joint.
The outer stub is the short shaft on the wheel side of the steering U-joint. It runs through the knuckle and its 27-spline end engages the unit bearing hub, where the axle nut holds it in place. Because XJ, YJ and TJ fronts use unit bearings rather than locking hubs, the stub turns with the wheel whenever the Jeep moves and carries drive torque whenever 4WD is engaged. It is short and sits right at the U-joint, so when the wheel is steered hard and the tire is loaded against a ledge, the stub takes a sharp twisting load. That is why it is usually the first front shaft to break. This Yukon stub is 4340 chromoly with cold roll formed splines and induction heat treating, a real step up from a factory part.
Raise the front, put the transfer case in 4WD and the transmission in park or gear, then turn each front tire by hand. A free-spinning side has a break between the carrier and the hub. Remove the axle nut and unit bearing and pull the shaft assembly. A clean break at the base of the U-joint ears or twisted wheel-end splines confirms the stub. Check the U-joint size before ordering: this stub needs the 5-760X joint. Our Dana 30 front axle problems guide lists the other front axle failures to check while it is apart, and the chromoly vs stock axle guide explains when stronger shafts are worth it.
The fitment table for YA W39125 lists the Dana 30 front in the 1984-2001 Jeep Cherokee XJ, 1987-1995 Wrangler YJ and 1997-2006 Wrangler TJ, plus the Dana 44 front on the 2003-2006 Wrangler TJ Rubicon. All are 4WD, and it is one outer stub per side. Two notes matter. First, it uses the larger 5-760X U-joint; axles built with the smaller 260X style joint need a matching inner shaft, such as the left-hand Dana 30 chromoly inner axle or the right-hand inner. Second, Yukon's technical note says 1990 and older vehicles require the YB U43379 hub upgrade. If you have an early XJ or YJ, check your hub before ordering, or send us your year and VIN and we will confirm. Other front axle parts are on our hard parts page.
For Jeeps that want to stop turning the front shafts on the highway, the Yukon Spin Free locking hub conversion for 27-spline TJ, XJ and YJ is built around the same 27-spline stubs. If the carrier needs work too, a 27-spline Dana 30 limited slip drops into the same axle.
| Brand | Yukon Gear & Axle |
| Part number | YA W39125 |
| Fits | Yukon Gear 4340 Chrome-Moly Repl. Outer Stub For Dana 30 / 95+ Wrangler / Uses 5-760X U/Joint |
| Type | Axles |
| 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.
Yes. The fitment table includes the 2003-2006 Wrangler TJ Rubicon Dana 44 front as well as the Dana 30 front in XJ, YJ and standard TJ models.
The 5-760X series U-joint. If your axle was built with the smaller 260X joint, the inner shaft has to be upgraded to the 760X size to match.
It is on the fitment list, but Yukon notes that 1990 and older vehicles require the YB U43379 hub upgrade. Check your unit bearing first or send us your VIN.
6.11 inches long with 27 splines at the wheel end. Measure your old stub and count splines if your axle has been swapped or modified.
A new U-joint at minimum. Inspect the unit bearing, ball joints and inner tube seal while the knuckle is apart and replace anything worn.
Yes, it is one stub. The listing is not side-specific, so the same stub serves either side; order two if you want to do both.
