Yukon Gear 10.25in & 10.5in Ford Carrier installation Kit
Swapping the differential in a Ford Sterling 10.25 or 10.5 rear axle, or tracking down a steady growl from under a Ford three-quarter or one-ton truck? Whether you are putting a locker or limited slip into an F-250, F-350 or Excursion, or replacing a worn Trac-Lok case, the carrier bearings come off with the old carrier and should not go back on. Yukon CK F10.25 is the carrier-side install kit for the Ford 10.25 and 10.5: Yukon lists carrier bearings, races and a carrier shim kit. There are no pinion parts in it, which keeps the cost down when the pinion side is healthy.
The Sterling is a 12-bolt-cover, full-floating rear with 35-spline shafts. The differential case and ring gear turn on two tapered roller bearings held in the housing by bolted caps. On these axles, carrier bearing preload and ring gear backlash are set with threaded adjusters at the bearing caps, as our Sterling guide explains, rather than with a shim stack behind each bearing as on many other axles. New bearing cones have to be pressed onto any new carrier, and new races go in the housing so the bearings run on fresh surfaces. Ford built the 10.25 with a two-pinion case and the later 10.5 with a stronger case, and the cases interchange between the two axles, which is why one install kit covers both.
Our carrier bearing noise guide walks through separating carrier, pinion and wheel bearing noise. Then drain the axle, pull the cover and check the pinion: rock the yoke and look for play. If the pinion bearings are loose or howl on throttle, or the gear teeth are pitted, you need the full Yukon master overhaul kit for 07 and down 10.5 instead, which adds pinion bearings, seal and crush sleeve. Our Sterling 10.5 problems guide covers the pinion bearing failures these axles are known for.
Yukon lists CK F10.25 for the Ford 10.25 and 10.5 inch rear. The Sterling 10.25 went under heavy Ford pickups starting in the mid-1980s, and the 10.5 followed for 1999 and later Super Duty F-250 and F-350 trucks and the 2000-2006 Excursion. Ford revised the housing and pinion in later years, and Yukon sells separate overhaul kits by year range, so on a 2008 or newer truck compare the bearing numbers on your old cones and races with the kit before you press anything. A semi-float 10.25 found under some light-duty F-250 and F-150 7700 trucks takes different carriers, and some later F-250s used a non-Sterling rear, so read the axle tag or the door sticker axle code. If you are unsure, send us your year and VIN.
| Brand | Yukon Gear & Axle |
| Part number | CK F10.25 |
| Fits | Yukon Gear 10.25in & 10.5in Ford Carrier installation Kit |
| Type | Differential Install Kits |
| 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.
Yukon lists carrier bearings, carrier bearing races and a carrier shim kit. It does not include pinion bearings, a pinion seal or a crush sleeve.
Yukon lists it for both. The two axles share carrier interchangeability, but on 2008 and newer trucks compare the bearing numbers on your old parts with the kit before installing.
Yes, in most cases. A new carrier needs bearing cones pressed onto it, and the old races should be replaced with them so the new bearings run on fresh surfaces.
If the pinion has play, the pinion bearings howl, or the pinion seal is leaking, the master overhaul kit adds pinion bearings, seal and crush sleeve so the whole axle is refreshed at once.
75W-90 or 75W-140 gear oil as specified for your truck, plus limited slip friction modifier if the carrier uses clutches.
