Yukon Gear Duragrip Posi For GM 8.2in w/ 28 Spline Axles / 3.08 and Up
Laying one black stripe out of a 1964-1972 Chevelle, Impala, El Camino, Nova or early Camaro is the classic sign that the Chevrolet 8.2 inch ten-bolt is an open case or a worn-out posi. The Yukon Gear and Axle YDGGM8.2-3-28-1 Dura Grip is a complete, new clutch-type positraction for the Chevy 8.2 with 28-spline axles and a 3.08-or-higher numerical gear ratio. It drops in where the original carrier lived and puts power to both rear tires again.
The 8.2 is a C-clip rear: the axle shafts are held in by clips at their inner ends, and those clips are trapped by the cross shaft inside the carrier. An open carrier always sends torque to the tire with the least grip. The Dura Grip adds a composite clutch pack behind each side gear, spring-loaded so the two axles are lightly tied together at all times. Under throttle the spider gears push the side gears outward, the clutches clamp harder, and torque moves to the tire that can use it. Per Yukon, the case is high-strength nodular iron, the spider gears are forged 4320 chromoly, the unit is assembled in the USA and it is fully rebuildable, so worn clutches can be replaced later without buying another case.
Make sure the axle really is the Chevrolet 8.2. The Buick, Olds and Pontiac cars of the same era used a different 8.2 that does not share parts, and later cars moved to the corporate 8.5. The Chevy 8.2 housing is smooth and rounded along the bottom of the cover opening, while the 8.5 has squared lugs there. Our GM 10-bolt vs 12-bolt guide sorts out the family. Next, confirm 28 axle splines and check the ratio with the turns-counting method in our gear ratio and axle code guide. This case is the 3.08-and-up version; an axle with lower numerical gears needs a different case or a regear, as explained in carrier break explained. If you are still deciding between a posi and a locker, read open vs limited slip vs locker.
Yukon's application list for this unit is the Chevrolet 8.2 rear in the 1964-1972 Bel Air, Biscayne, Impala and El Camino, 1967-1970 Camaro, 1966-1971 Caprice, 1964-1972 Chevelle (Yukon also lists 1973), 1964-1968 Chevy II, 1969-1972 Nova and 1970-1972 Monte Carlo. Many of these cars came with other axles too, and decades of swaps mean the car's title year proves nothing about what is under it. Check the housing shape, spline count and ratio, or send us the year, VIN and any axle code stamped on the tube and we will confirm it. Matching hardware such as the Chevy 8.2 1310 pinion yoke and a ten-bolt chrome cover are in stock too.
A new case is the right time to refresh the whole center section. The Yukon 1964-72 Chevy 8.2 master overhaul kit supplies carrier and pinion bearings, shims, seal and ring gear bolts. Remember that the 8.2 ring gear bolts are left-hand thread. Yukon's setup chart lists the Chevy 8.2 at 12-15 in-lb pinion preload with new bearings (6-7 used), 55 ft-lb on the ring gear bolts and 60 ft-lb on the bearing caps. Set backlash and check the pattern before final assembly, then reinstall the C-clips and cross shaft. Yukon recommends a non-synthetic GL-5 gear oil with its limited slip additive and warns that synthetic oil can make the unit aggressive or noisy. If the axle tubes have tired shafts, a new 28-spline 8.2/8.5 passenger car axle matches this case. Break the posi in gently with no burnouts or towing for the first few hundred miles, following our break-in procedure.
| Brand | Yukon Gear & Axle |
| Part number | YDGGM8.2-3-28-1 |
| Fits | Yukon Gear Duragrip Posi For GM 8.2in w/ 28 Spline Axles / 3.08 and Up |
| 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.
No. The Buick, Olds and Pontiac 8.2 is a different axle from the Chevrolet 8.2. This unit is for the Chevy 8.2 with 28-spline axles; Yukon makes a separate Dura Grip for the BOP rear.
Not with those gears. This version is for 3.08 and higher numerical ratios. Lower ratios mount the ring gear differently, so you need the matching low-ratio case or a regear to 3.08 or numerically higher at the same time.
Yukon recommends a high-grade non-synthetic GL-5 gear oil plus its limited slip additive. It specifically says synthetic oil is not recommended and may cause aggressive or noisy operation. Fill to the bottom of the fill hole.
Plan on separate carrier bearings and races. Reusing old bearings on a new case is not a good idea; the 1964-72 Chevy 8.2 master overhaul kit covers bearings, shims, seal and ring gear bolts in one box.
Yes, if the ring and pinion are not worn or chipped and the axles are 28 spline with good bearing surfaces. The ring gear bolts on an 8.2 are left-hand thread, and new bolts are cheap insurance.
Yes. Yukon describes it as fully rebuildable, so when the composite clutches eventually wear, the case and gears stay in service and only the clutch parts are replaced.
