Yukon Gear Dura Grip Positraction For 10.5in GM 14 Bolt Truck / 4.10 & Down
The GM 14-bolt full-floating 10.5 inch rear axle sits under decades of Chevrolet and GMC 2500 and 3500 pickups, Suburbans, Express and Savana vans and Avalanche 2500s, and most of them left the factory with an open or worn-out carrier. The Yukon Dura Grip YDGGM14T-3-30-1 is a clutch-type positraction for that axle with 30-spline shafts and ring and pinion ratios of 4.10 and numerically lower, and Yukon notes it also accepts thick gears. If your truck spins one rear tire pulling a trailer off wet grass or out of a gravel lot, this is the street-friendly traction fix.
An open 14-bolt carrier always splits torque evenly, so the axle can only push as hard as the tire with the least grip. The Dura Grip adds preloaded clutch packs behind the side gears. Those clutches tie each axle shaft to the case, so when one tire unloads, the clutch friction keeps driving the other one. In a turn the clutches slip and let the outside wheel run faster, so it drives like a stock truck. Yukon builds it with a nodular iron case, forged 4320 chromoly spider gears in a four-pinion layout and composite clutch plates, and the unit is fully rebuildable, which suits a work truck that will see years of towing.
Count the cover bolts and measure the ring gear: the 10.5 has a 14-bolt cover and a large pinion nut out front, while the semi-float 9.5 and the newer AAM 11.5 can look similar. Our GM 14-bolt vs AAM 11.5 guide shows the visual tells. Then read the ratio stamped on the ring gear; anything 4.10 or lower (3.42, 3.73, 4.10) fits this case, and 4.56-and-up standard gears need the other carrier. The 14-bolt rear axle problems guide covers bearing and pinion wear worth fixing during the same job.
Yukon's application list for this part covers the GM 10.5 inch 14-bolt rear, 30-spline, across 1973-1986 Chevrolet C20/C30 pickups and Suburbans, 1988-2000 C2500 and C3500, 1991-2002 C3500HD, 1999-2015 Express 2500 and the 2002-2006 Avalanche 2500, among others. Yukon tracks four versions of the axle itself ('88-and-older, '84-'85 only, '89-'98 and '99-and-up), and bearings differ between them, so match your axle code and spline count or send us your year and VIN before ordering. If you would rather have a full automatic locker, the Grizzly Locker for the 10.5 14-bolt and the Detroit Locker 225S10 fit the same axle. More carriers are in our hard parts category.
Pull the hub flange bolts and slide the full-floating shafts out; no C-clips are involved. Remove the carrier, transfer the ring gear with new bolts, and install fresh carrier bearings. The Yukon 14-bolt minor install kit covers carrier bearings, shims and hardware, and on older trucks the 1988-and-older master overhaul kit adds pinion bearings and seals. Check backlash and the contact pattern after the carrier goes in. For fluid, Yukon recommends a high-grade non-synthetic GL-5 gear oil plus two bottles of Yukon limited slip additive; synthetic oil is not recommended and can make the unit aggressive or noisy. Our friction modifier guide explains why. Drive gently for the first few hundred miles so the new clutches bed in.
| Brand | Yukon Gear & Axle |
| Part number | YDGGM14T-3-30-1 |
| Fits | Yukon Gear Dura Grip Positraction For 10.5in GM 14 Bolt Truck / 4.10 & Down |
| Type | Differentials |
| 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.
Only if the 4.56 set is a thick gear set. Yukon lists this case for 4.10 and numerically lower ratios and also for thick gears. Standard-thickness 4.56 and deeper gears need the 4.56-and-up carrier.
No. It is built for the full-floating GM 10.5 inch 14-bolt with 30-spline axle shafts. The 9.5 and the AAM 11.5 use different carriers.
Yukon recommends a non-synthetic GL-5 gear oil and two bottles of its limited slip additive. Synthetic oil is not recommended with this unit.
Yes. The clutch packs can be replaced when they wear, so the case and gears stay in service for the life of the truck.
A clutch posi like the Dura Grip is smoother on the street and in turns, which suits a daily-driven tow rig. A full locker gives more traction off-road but can push the truck straight in turns on slick pavement.
Carrier bearings, races and shims at minimum, plus gear oil and limited slip additive. If the pinion bearings are noisy, a master overhaul kit is the better choice.
