Yukon Gear Master Overhaul Kit For Dana S110
If the rear axle under your Ford F-450 or F-550 Super Duty chassis cab has started to howl under load, rumble at highway speed, or weep oil at the pinion, the Dana S110 or S130 behind it probably needs bearings. These are the big commercial-duty rears Ford fitted to its heaviest Super Duty trucks, and they spend their lives hauling dump beds, wreckers and service bodies. Yukon Gear & Axle YK DS110 is a master overhaul kit built for the Dana S110, S111, S130 and S132, with Timken bearings and races plus the seals and small parts to rebuild the center section.
In these axles the pinion rides on a pair of tapered roller bearings and the differential carrier spins on two more. Those bearings carry every pound of torque the diesel puts down and every bump the loaded truck takes. As they wear, the pinion and ring gear stop meshing where they were set, and the axle starts to whine. Left alone, worn bearings overheat the oil, chew up the gear teeth and can eventually let the pinion move far enough to break a tooth.
The master kit replaces the wear items as a set so the rebuild starts from known-good bearings rather than mixing new and used. Yukon describes the kit as Timken bearings and races with high-quality seals and small parts. Unlike a light-duty axle, the S110 family sets pinion preload with a selective solid spacer instead of a crush sleeve; Yukon sells that spacer assortment separately as SK DS110, eight spacers from 1.082 to 1.099 in tall, so measure your original spacer during teardown.
A loaded chassis cab has plenty of other noise sources, so rule out tires, wheel bearings and the driveline first. Our carrier bearing noise guide explains how bearing noise changes with load and speed. Then check the yoke for play, drain the oil, and measure ring gear backlash with a dial indicator and magnetic base before teardown so you know where the gears were. If only the pinion seal is leaking and the bearings are tight, the pinion seal leak guide covers that smaller job.
Super Duty pickups and some F-450s used a Sterling 10.5 or a Dana 80 instead, and later trucks moved to other axles, so read the axle tag on the housing before ordering. Yukon lists the S135 separately with its own setup numbers, and this kit is not listed for it. Send us your year and VIN if the tag is gone. More differential kits are in our rebuild kits category, and our Dana 80 rear axle guide covers the other common Super Duty rear.
If both rear wheel seals are weeping too, do the hubs at the same time with the Yukon F-450 and F-550 axle bearing and seal kit, which services one side per kit.
| Brand | Yukon Gear & Axle |
| Part number | YK DS110 |
| Fits | Yukon Gear Master Overhaul Kit For Dana S110 |
| Type | Differential Overhaul Kits |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
Yukon lists this kit for 2004-2015 Ford F-450 Super Duty 2WD with the S110 and 2005-2015 F-450 and F-550 Super Duty 2WD and 4WD with the S110 or S130. Check the axle tag to confirm.
Yukon lists YK DS110 for the S110, S111, S130 and S132 only. The S135 has its own setup specifications, so confirm a kit made for it.
No. The S110 family sets pinion preload with a selective solid spacer. Measure the original during teardown; Yukon sells an assortment of spacers separately as SK DS110.
Yukon's chart lists 20-40 in-lb pinion preload with new bearings, 10-16 in-lb with used, and 0.009-0.016 in backlash for this axle family.
Yes, if the teeth show no pitting, chips or heat discoloration. Record shim and spacer sizes during teardown so you can return the gears to their original position with the new bearings.
