Complete bearing and seal overhaul kit for the 2000-2010 Ford 9.75 rear end, with carrier and pinion bearings, races, shims, crush sleeve and bolts.
If your 2000-2010 F-150 or solid-axle Expedition with the 9.75 in. rear howls on deceleration, whines while towing, or drips gear oil from the pinion yoke, the bearings in the center section are past their service life. This master overhaul kit cross-references to USA Standard Gear ZK F9.75-B, the Koyo-bearing kit built for the 2000-2010 generation of the Ford 9.75. It carries every bearing, race, seal and setup part needed to rebuild the axle or install a new ring and pinion, so nothing old goes back in.
The 9.75 is Ford's heavier half-ton axle: a semi-floating C-clip design with a 12-bolt cover, used where an 8.8 would be undersized for towing. The pinion turns on two tapered roller bearings whose preload comes from a crush sleeve, with pinion depth set by a shim under the inner bearing. The carrier rides on two tapered side bearings positioned by shims that set backlash and side preload. Decel howl is the classic 9.75 complaint, and it usually means the pinion bearings have worn enough that the crush sleeve no longer holds preload, letting the pinion move away from the ring gear when the truck coasts.
Listed contents of the ZK F9.75-B kit:
Drive at the speed where the noise is loudest and note whether it is on throttle, cruise or coast; diff noise follows load, while wheel bearing noise changes when you swerve. With the truck on stands, rock the pinion flange by hand to check for play. Pull the cover and inspect the oil, the magnet and the gear teeth; chipped or scored teeth mean new gears along with the bearings. Our Ford 9.75 rear axle problems guide and the whine diagnosis guide cover the noise checks in detail.
USA Standard lists the ZK F9.75-B for 2000-2010 Ford 9.75 in. axles, which covers the F-150 and the solid-axle Expedition of that era. A few details to check first. Early 1997-1999 9.75 axles use a different kit. Yukon splits its own Timken kits into 2000-2007 and 2008-2010 versions, so on a 2008-2010 truck compare the bearing numbers on your old parts with the ones in this kit. The 2003-and-later Expedition and Navigator use an independent rear 9.75, and Yukon notes its 9.75 kits do not include the IRS CV axle seals or needle bearings. From 2011 on, Ford redesigned the axle; those trucks need the ZK F9.75-D kit for 2011-up 9.75. Count the cover bolts (12 on a 9.75, 10 on an 8.8; see 8.8 vs 9.75 differences), read the axle code on the door tag, or send us the year and VIN. More kits are in our rebuild kits collection.
| Axle | Ford 9.75 inch rear, 2000-2010 |
| Cross reference | ZK F9.75-B |
| Includes | Carrier and pinion bearings and races, pinion seal, crush sleeve, pinion nut, ring gear bolts, gaskets, shims, marking compound, thread locker |
| Listed vehicles | Ford F-150, Expedition |
No. Ford redesigned the 9.75 for 2011 with different bearings and dimensions. Those trucks need a 2011-up kit such as the ZK F9.75-D.
Those Expeditions and Navigators use an independent rear 9.75. Yukon notes its 9.75 kits do not include the IRS CV axle seals or needle bearings, so send us your VIN before ordering for an IRS SUV.
Coast howl usually means the pinion bearings have worn and the crush sleeve has lost preload, so the pinion moves when the load comes off. Tightening the pinion nut does not fix it; the bearings and sleeve need replacing.
Yes. The kit carries all bearings, races, shims, crush sleeve and ring gear bolts for a regear. Set pinion depth with the shims, then preload, then backlash and pattern.
The 9.75 has a 12-bolt cover and the 8.8 has a 10-bolt cover. The axle code on the door tag also tells you the axle and ratio.
Check the axle shaft bearings and seals while the shafts are out, and look at the spider gears and cross pin. Fresh gear oil and friction modifier on a limited slip finish the job.
