When maximum axle strength is the goal, a 40 spline wheel-end system is one of the most proven upgrades available. This collection includes the wheel hubs, spindles, bearings, drive flanges, spindle hardware, and supporting components needed to build or service a heavy-duty 40 spline rear axle assembly.
Designed around the Crane Axle 40 Spline Spindle System, these components are engineered for rock bouncers, Ultra4 race cars, competition crawlers, mud trucks, and high-horsepower off-road vehicles that demand more from their drivetrain than factory wheel-end systems can provide.
Shop 40 spline rear spindles, billet aluminum wheel hubs, wheel bearing kits, drive flange kits, spindle sockets, spindle nuts, and wheel-end service components built to handle massive tires, aggressive driving, and extreme shock loads. Whether you're building a custom GM 14-bolt axle, upgrading an existing rear axle, or replacing service items, these components are designed to work together as a complete high-strength wheel-end solution.
For serious off-road builders, moving to a 40 spline wheel-end system provides increased axle capacity, improved durability, simplified serviceability, and race-proven reliability in the harshest environments.
Popular Applications
- GM 14-Bolt Axles
- Rock Bouncers
- Ultra4 Race Cars
- Competition Crawlers
- Trail Buggies
- Mud Trucks
- Custom Fabricated Axle Housings
- High-Horsepower Off-Road Vehicles