14 Bolt Internal Build Kit

The 10.5″ GM 14-bolt axle is one of the strongest and most reliable rear ends you can run in demolition derby, but pulling a used axle from a junkyard often means dealing with unknown mileage, worn bearings, questionable gear setups, or gear ratios that simply don’t work for on the track.

To make your build easier, we’ve assembled a complete all-in-one upgrade kit that gives you everything needed to refresh your 14-bolt and get it derby-ready fast.

What This Kit Includes

• Revolution Gear & Axle Ring and Pinion — Choose the gear ratio that best fits your derby setup.
• Full Spool (30 or 40 Spline) — Locks both axles for maximum traction and durability.  30 spline for stock axles, 40 spline for aftermarket upgraded axle setups.
• Complete Master Bearing Kit — Includes all carrier and pinion bearings, races, shims, seals, and hardware needed for a proper rebuild.
• Optional Crush Sleeve Eliminator — Replaces the factory crush sleeve with a solid spacer and shims for precise, repeatable pinion preload and improved durability.

Why Choose This Kit?

• Perfect for the high abuse world of demolition derby.
• Eliminates weak or worn components in used 14-bolt axles.
• Convenient one-box solution—no searching for compatible parts.

Whether you’re refreshing a worn-out axle or gearing up for your next derby season, this kit provides everything you need to build a strong, dependable 14-bolt rear end you can trust on the track.