USA Standard Gear

USA Standard ring & pinion sets are the right choice when price is a factor and quality is essential. USA Standard Gear offers a full line of ring & pinion sets for a variety of common & hard to find applications. USA standard gear offers a lower cost alternative to other manufacturers when price must be kept low. USA standard gear offers a standard one year warranty against defects on their ring & pinion sets.

Eaton Posi LSD

The Eaton Posi limited-slip differential prevents wheel slip before it can get started. To do that, carbon disc clutch packs, preloaded by a central spring assembly, are located behind each differential side gear. When torque input increases the clamping load on the clutch packs increases. That causes the chatter-free clutch packs to grab and transfer power to the other wheel. Muscle cars, hot rods and mild off-road vehicles should look to Eaton's limited-slip differential for their traction answers. And the fact is, Eaton's Posi units are virtually bullet proof.​

Recommended oil is standard 80/90 weight (non-synthetic) (with posi additive).

Master Install Kit

Premium master install kit uses only the highest quality components including Koyo brand bearings. Included are carrier bearings and races, pinion bearings and races, pinion seal, complete shim kit, ring gear bolts, pinion nut, crush collar, threadlock, marking compound, brush, and gasket or RTV silicone.

Application: 1972-1987 GM 8.5" Rearend (10 bolt cover)

Axle Spline: 28

Pinion Spline: 30

Package Includes:

1- GM 8.5" USA Standard Ring and Pinion set

1- GM 8.5" Eaton Posi LSD

1- GM 8.5" Master install kit