Yukon Gear Rear 4340 Chrome-Moly Replacement Axle For Dana 60 w/ 30 Spline (Single Axle)
Twisted a rear shaft in a full-floating Dana 60 behind a locker and 37s, or building a one-ton rear for a rig that needs a custom length? Yukon YA WFF30-36.5 is a single 4340 chromoly rear axle shaft for the Dana 60 full-float with 30 splines. It is a cut-to-length shaft: Yukon rates it for 34 to 36.5 inch applications and lists an 8 x 3.96 inch flange bolt pattern. Price is for one shaft.
In a full-floating Dana 60 rear, each hub runs on two tapered bearings on a spindle at the end of the housing tube. The housing carries the truck, so the shaft is only asked to turn the hub: its splines engage the side gear and its flange bolts to the face of the hub. That makes shaft swaps easy, but it also means the shaft is the weak point under shock torque. Full-float shafts usually fail by twisting along their length or shearing near the splines. 4340 chromoly, cold roll formed splines and induction heat treating, which Yukon uses here, are aimed at exactly that failure.
Unbolt the flange and pull the shaft; the wheel can stay on the ground. Look down the splines for a spiral, roll the shaft on a flat floor for straightness and count the splines. Dana 60 rears were built with both 30 and 35-spline shafts, so the count matters. Then measure: because the center section of many Dana 60 rears is offset, the left and right shafts are often different lengths, and each side has to be measured. Our Dana 60 rear axle problems guide covers the bearing and gear faults worth checking while it is apart, and chromoly axle shafts vs stock explains when the upgrade pays off.
Yukon publishes no vehicle table for this shaft and says to verify fitment manually, so fitment is by measurement: a Dana 60 full-float rear, 30-spline side gears, a finished length between 34 and 36.5 inches and a hub that matches the 8 x 3.96 inch flange bolt pattern. It suits narrowed or rebuilt housings as well as stock trucks that fall in that range. Have a driveline shop cut it and finish the splines to your measured length. If you do not need chromoly, the Yukon 1541H Dana 60 rear axle for 34 to 36.5 inch applications covers the same range in alloy. Send us your measurements and spline count if you want a second check.
| Brand | Yukon Gear & Axle |
| Part number | YA WFF30-36.5 |
| Fits | Yukon Gear Rear 4340 Chrome-Moly Replacement Axle For Dana 60 w/ 30 Spline (Single Axle) |
| 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.
One shaft. Most Dana 60 rears need two shafts of different lengths, so measure and order each side.
Yukon makes it long and rates it for finished lengths of 34 to 36.5 inches. A driveline shop cuts it to your measurement and finishes the splines.
No. It is a full-float shaft with a bolt-on drive flange. Semi-float Dana 60 shafts carry a wheel bearing and the wheel itself.
Pull a shaft and count the splines. Dana 60 rears were built both ways, and this shaft only fits 30-spline side gears.
Yukon publishes no vehicle list for it. It fits any Dana 60 full-float rear with 30-spline side gears, an 8 x 3.96 inch flange pattern and a finished length of 34 to 36.5 inches.
75W-90 or 75W-140 gear oil, with friction modifier if the carrier is a clutch-type limited slip.
