Yukon Gear 1541H Alloy Replacement Rear Axle For Dana 60 70 And 80
If a heavy-duty pickup with a Dana 60, Dana 70 or Dana 80 rear end has snapped a shaft while towing, or the flange end has twisted from years of hauling, this is a 35-spline full-float replacement that is built to be shortened to fit. Yukon YA FF35-36.5 is a 1541H alloy rear shaft for full-float housings measuring 34 to 36.5 inches, with an 8 x 3.96 inch flange bolt pattern. One-ton and three-quarter-ton Ford, Ram and GM trucks, plus converted builds running these axles, are the usual home for it.
In a full-float axle the truck's weight never rests on the shaft. Each wheel hub rides on its own pair of bearings on a spindle bolted to the end of the axle tube, and the shaft only transmits torque. Its inner end engages the side gear in the carrier through 35 splines, and its outer flange bolts to the hub. Yukon's own technical FAQ explains it this way: the wheel does not bolt to a full-float shaft, and the shaft can be pulled with the wheel still on the truck. That is why a broken full-float shaft does not let the wheel leave the vehicle, and why the shaft is the part that takes all the twisting load when a heavy trailer gets pulled from a stop.
There is no specific trouble code for a broken axle shaft, so diagnosis is mechanical.
Remove the flange bolts at the hub and slide the shaft straight out; on a full-float axle this does not require removing the wheel. A broken shaft usually comes out in two pieces. Inspect the splines on an intact shaft for twisting, which shows up as a spiral in what should be straight teeth. Check hub bearing adjustment while the shaft is out. If metal came out with the shaft, plan to look at the carrier too, and a Dana 60 and 61 rear master overhaul kit covers bearings, seal and shims if it needs to come apart.
Yukon lists this part for Dana Spicer 60, 70 and 80 full-float rear axles with 35-spline side gears. It is a cut-to-length design for applications from 34 to 36.5 inches with an 8 x 3.96 inch flange bolt pattern. These axles were built with several spline counts. Wikipedia's Dana 60 entry lists 30 as the most common rear spline count, and the Dana 70 used 23, 32 or 35-spline shafts over its life. Count the splines on your old shaft. If it has 30, the 30-spline Yukon Dana 60 shaft is the one to look at. Measure the old shaft the way Yukon specifies for full-float designs, from the spline end to the front surface of the mounting flange, and confirm the flange bolt pattern. If you are not sure which axle you have, send the axle tag or the year and VIN.
| Brand | Yukon Gear & Axle |
| Part number | YA FF35-36.5 |
| Fits | Yukon Gear 1541H Alloy Replacement Rear Axle For Dana 60 70 And 80 |
| 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.
No. It is a cut-to-length design for housings from 34 to 36.5 inches. Measure your old shaft from the spline end to the front surface of the flange and have the new one shortened to match before you install it.
No. This shaft has 35 splines and only works with 35-spline side gears. Yukon makes a separate 30-spline Dana 60 version, YA FF30-36.5.
No. It is a full-float shaft with a bolt-on flange. Semi-float Dana 60 axles carry the wheel on the shaft and use a different shaft design.
Yukon lists an 8 x 3.96 inch bolt pattern. Check it against your hub before ordering.
On a full-float axle the shaft pulls out once the flange bolts are removed, with the wheel still on the truck. You still need a new gasket and the correct torque on the flange fasteners when it goes back in.
