Yukon Gear Axle Bearing & Seal Kit For GM 11.5in aam Rear
If your 2010-or-older Silverado or Sierra 2500HD or 3500 has a growl from one rear corner, a wheel that rocks on the spindle, or gear oil running down the inside of a rear tire, the full-float hub bearings or the hub seal on that side are the first place to look. The Yukon Gear & Axle AK GM11.5 is the wheel-end kit for that job: a new inner bearing and race, a new outer bearing and race, and a new axle seal. It services one side of the truck, so a two-sided job takes two kits.
On a full-floating axle the hub, not the axle shaft, carries the weight of the truck. Each rear hub rides on two tapered roller bearings that sit on a fixed spindle bolted to the axle tube, and the axle shaft only delivers torque through a bolted flange. That design is why heavy-duty trucks can tow so much, but it also means the hub bearings take every pound in the bed and on the hitch. The seal at the back of the hub keeps gear oil from the axle tube on the inside of the hub and out of the brakes. When the seal hardens or a bearing wears, oil gets out, dirt gets in, and the bearing goes downhill quickly.
Yukon lists the bearings in this kit by size, which is the easiest way to confirm a match on the bench:
Lift the axle so both rear tires are off the ground. Grab the tire at the top and bottom and rock it; any clunk or visible movement at the hub means end play, and a bearing that is worn or out of adjustment. Spin the wheel slowly and listen for a gritty or rough sound. Then compare it to the other side. A pinion or carrier bearing in the center section can sound a lot like a hub bearing on these axles, so if both hubs are tight and quiet, the noise is probably inside the differential and the YK GM11.5 master overhaul kit is the part you want instead.
Yukon titles this kit for 2010-and-down GM 10.5 in. and 11.5 in. rear axles. In practice that means the full-float 11.5 in. AAM rear under 2001-2010 GM 2500HD and 3500 pickups, plus the 10.5 in. 14-bolt axles that share these bearing sizes. The 14-bolt went through several bearing changes over its long life, and older 14-bolts often take the separate Yukon AK GM14T 14-bolt bearing and seal kit, so measure your old races against the sizes above before you order. Two other exclusions matter. First, 2011-and-newer GM 11.5 axles use larger hub bearings, and Yukon sells a different kit for them (AK GM11.5-B), so this one will not fit. Second, Ram trucks with the AAM 11.5 use their own wheel-end design; for those, use the Yukon 11.5 Dodge rear wheel bearing and seal kit. If you are unsure, send us your year, model and VIN and we will confirm it. More axle parts are in our hard parts collection.
| Brand | Yukon Gear & Axle |
| Part number | AK GM11.5 |
| Fits | Yukon Gear Axle Bearing & Seal Kit For GM 11.5in aam Rear |
| Type | Bearings |
| Condition | New |
| Ships | Same business day (in stock), from the USA |
| Warranty | 1-year |
No. The AK GM11.5 services one side: one inner bearing and race, one outer bearing and race, and one seal. Order two kits to do both hubs at the same time.
No. GM 11.5 axles from 2011 on use larger hub bearings. This kit is for 2010-and-down axles. Yukon sells a separate 2011-up kit, AK GM11.5-B, for the later trucks.
No. The Ram version of the 11.5 uses a different wheel-end setup. Use the Yukon 11.5 Dodge rear wheel bearing and seal kit for Ram trucks.
With the rear tires off the ground, rock each wheel at the top and bottom and spin it by hand. Play or roughness at one hub points to that hub bearing. If both hubs are tight and quiet, the noise is more likely a pinion or carrier bearing in the center section.
On these full-float axles the hubs are lubricated from the axle housing, so refill the axle with the gear oil grade in your owner's manual, usually 75W-90, and check the level after the first drive.
