3.73 Ring & Pinion + Master Bearing Install Kit – GM 8.5" 10-Bolt By National Drivetrain

Ready to re-gear that GM 8.5-inch 10-bolt?

National Drivetrain put together a complete master kit for ya.

You get the 3.73 ring and pinion plus every bearing and shim you need to set it up right.

This isn't a half-measure—it's the full install package.

Part number GM10-373A R10REMK.

Brand new, all in the box, no hunting for missing crush sleeves or carrier bearings.

Whether you're building a street machine, a truck, or just need deeper gears for better grunt, this kit has you covered.

Backed by warranty, includes UPC 842234116436.

Swap those highway gears for something with more torque.