Yukon Gear Master Overhaul Kit For 2011+ Ford 10.5in Diffs Using OEM Ring & Pinion

A Ford F-250 or F-350 Super Duty that has started to whine on the highway, growl on decel or leak from the pinion seal usually has tired bearings in its 10.5 in. rear axle. The Yukon Gear & Axle YK F10.5-D master overhaul kit is built to rebuild the 2011-and-up Ford 10.5 in. differential while keeping your factory ring and pinion. It is new, part number YK F10.5-D, and gives you every bearing, race, seal and small part needed to set the axle up again from scratch.

What this overhaul kit does in a Ford 10.5 rear axle

The 10.5 in. axle under Super Duty pickups is a full-floating, 12-bolt-cover, 12-bolt-ring-gear design. The pinion rides on two tapered roller bearings, and the carrier rides on two more. Gear life depends on those four bearings holding pinion depth, pinion preload, carrier preload and backlash exactly where they were set. Once a bearing pits or a race spalls, the gear contact pattern moves and the axle starts to whine. Yukon's kit replaces all of it: Timken carrier bearings and races, Timken pinion bearings and races, a pinion seal, a complete shim kit, ring gear bolts, a pinion nut, a crush sleeve, thread locker, marking compound with a brush, and a cover gasket. Yukon builds this version for the 37-spline pinion found in 2011-up Ford 10.5 housings.

Symptoms that call for a master overhaul

• A whine that rises and falls with road speed, louder on acceleration or on coast.
• A rumble or growl that changes with load but not with steering, pointing to carrier or pinion bearings.
• Clunk on take-off or excessive driveshaft play from a loose pinion nut or collapsed crush sleeve.
• Gear oil leaking at the pinion seal, often with a wet driveshaft yoke.
• Metal glitter in the gear oil when you pull the cover.

How to confirm before you buy

Lift the rear, rotate the pinion by hand and feel for roughness. Grab the yoke and check for in-and-out play, which means lost pinion preload. Drain the oil and look at the magnet and the cover. Paint a few ring gear teeth with marking compound and read the contact pattern; a pattern that is still centered usually means the gears can be reused with this kit, while chipped or heavily pitted teeth mean you need a new ring and pinion first. Wheel bearing noise can sound similar, so check each hub for play before you tear into the center section.

Fitment

The YK F10.5-D is listed for 2011-and-up Ford 10.5 in. rear axles that keep the original ring and pinion, with a 37-spline pinion only. Published fitment for this kit is the 2011-2019 F-250 Super Duty and the 2011-2016 F-350 single rear wheel. Ford 10.5 housings differ by year, and 2007-and-earlier trucks use a different kit, the Yukon YK F10.5-A for 07 and down. Count your pinion splines, check the axle tag on the cover, or send us your year and VIN before ordering. For a lower-cost alternative with the same 2011-up coverage, compare the USA Standard ZK F10.5 kit, and see every axle rebuild kit in our rebuild kits collection.

Install notes

• Mark the carrier bearing caps before removal; they are machined with the housing and must go back on the same side.
• Set pinion depth with the supplied shims, then confirm it with the marking compound pattern before you crush the sleeve.
• Always use the new crush sleeve and pinion nut. Tighten in small steps and measure rotating torque; going past preload means starting over with another sleeve.
• Clean the ring gear bolt threads, use the supplied thread locker and torque to the factory spec.
• Set carrier preload and backlash, recheck the pattern, then fill with the gear oil grade and capacity in your owner's manual, adding friction modifier if your axle is limited-slip.

If the axle shafts or hub seals are also worn, the Yukon chromoly rear axle shaft for 2005-2020 Super Duty 10.5 is the time-saving upgrade while the axle is apart. Setting up a used ring and pinion takes patience and the right tools, and if the gears are damaged, replace them now rather than after the new bearings are in.

Does this kit include a ring and pinion?

No. The YK F10.5-D is built to rebuild a Ford 10.5 in. axle that keeps its original ring and pinion. It includes bearings, races, the pinion seal, shims, ring gear bolts, pinion nut, crush sleeve, thread locker, marking compound and the cover gasket.

Will it fit my 2008-2010 Ford Super Duty?

This kit is listed for 2011-and-up 10.5 in. axles with a 37-spline pinion. Earlier housings use different parts, and 2007-and-down trucks use the YK F10.5-A. Count your pinion splines or send us your year and VIN before ordering.

What bearings are in the kit?

Yukon uses Timken carrier bearings and races and Timken pinion bearings and races in this master overhaul kit.

Can I reuse my crush sleeve or pinion nut?

No. Use the new crush sleeve and pinion nut from the kit. A crush sleeve that is over-tightened cannot be backed off; it has to be replaced to set pinion preload correctly.

What gear oil should I use after the rebuild?

Use the grade and capacity Ford specifies in your owner's manual for your axle, and add friction modifier if the axle is a limited-slip unit. Break the new bearings and gears in gently for the first few hundred miles.