Yukon Gear Axle For GM 8.6in / 07 Up Chevy / 4Wd Abs Axle Disc Brake 34.25in
A rear wheel that wobbles, a growl from one corner that gets louder with speed, gear oil soaking a rear brake, or a broken shaft after towing are the reasons a 2007-2014 Silverado 1500, Sierra 1500, Tahoe or Yukon owner ends up looking for a rear axle shaft. The Yukon YA G15286380 is a replacement shaft for the GM 8.6 inch 10-bolt rear in those trucks: 30 spline, 6 lug, 34-1/4 inches long, for disc brake and ABS applications. It is new, made from Yukon's heat-treated alloy, and sold as a single shaft.
The 8.6 is a semi-float, C-clip rear axle. Each shaft slides into the housing tube, its splined inner end engages a side gear in the carrier, and a C-clip in a groove on that inner end keeps it from walking out. The outer end carries the wheel flange and rides on a roller bearing pressed into the axle tube, with a seal just outboard of it. Because the shaft itself is the bearing race and holds the wheel on, it carries the weight of the truck as well as the torque. When the bearing fails, the rollers cut a groove into the shaft, and a new bearing on a grooved shaft fails fast. If a shaft snaps, the C-clip design means the wheel and broken outer section can leave the housing, which is why a cracked or chewed shaft should be replaced, not driven on.
Lift the rear, pull the wheel and drum or rotor, and drain the axle. Remove the cover and the cross shaft bolt, push the shaft in to free the C-clip, then slide it out. Run a fingernail over the bearing contact area near the flange: a groove or flaking means the shaft is done. Check the inner splines for twist. If the noise is in the center rather than one corner, read our differential whine diagnosis guide first, because a worn pinion or carrier bearing sounds similar. The GM 10-bolt problems and rebuild cost guide covers the related failures.
Yukon lists this shaft for the GM 8.6 inch rear in 2007-2013 Chevrolet Silverado 1500 and GMC Sierra 1500, 2007-2014 Tahoe, Yukon and Yukon XL 1500, in two- and four-wheel drive. It is 34-1/4 inches long with 30 splines and a 6-lug flange for disc brakes with ABS. It does not include an ABS tone ring, so if your old shaft carries one it must be transferred or replaced. Earlier 1999-2004 8.6 trucks use a shorter 33-11/16 inch shaft, the Yukon YA G12471369, and these years of GM half-ton trucks were also built with other rear axles, so read the ring gear size off the axle code or measure your old shaft before ordering. Send us your year and VIN if you are unsure.
Replace the wheel bearing and axle seal any time a shaft comes out, and inspect the C-clip groove and the cross shaft. Coat the bearing and seal lip with gear oil, slide the shaft in carefully so the splines do not cut the new seal, push it past the side gear, fit the C-clip, then pull the shaft out to seat it before installing the cross shaft and its bolt with thread locker. Torque the cover bolts in a crisscross pattern and refill with 75W-90 gear oil to the bottom of the fill hole, adding friction modifier if the truck has a clutch-type posi. If the carrier is coming apart anyway, the Yukon master overhaul kit for 2009-up GM 8.6 and the Dura Grip posi for 30-spline 8.5 and 8.6 fit through the same cover opening. If a broken shaft took the side gears with it, a loaded 30-spline open carrier replaces the whole center assembly in one piece.
| Brand | Yukon Gear & Axle |
| Part number | YA G15286380 |
| Fits | Yukon Gear Axle For GM 8.6in / 07 Up Chevy / 4Wd Abs Axle Disc Brake 34.25in |
| Type | Axles |
| 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 this shaft for 2007 and later GM 8.6 trucks and SUVs. The 1999-2004 8.6 uses a 33-11/16 inch shaft instead. For 2005-2006 or classic-body 2007 trucks, measure your old shaft or send us the VIN before ordering.
No. Yukon notes the shaft does not include an ABS tone ring. If your factory shaft has one, it needs to be moved over or replaced.
Always replace the axle bearing and seal, because a new shaft on an old bearing will wear quickly. Check the C-clips and cross shaft, and use a new cover gasket or fresh RTV.
Yes. It is sold as a single shaft. Yukon does not list it by side, so lay your old shaft next to the 34-1/4 inch length and 30-spline count before installing, and replace both if the other side shows bearing wear too.
75W-90 gear oil to the bottom of the fill hole with the truck level. Add friction modifier only if the truck has a clutch-type limited slip.
