Crane Axle GM 14-Bolt Billet Spindle & Aluminum Hub Kit - 30 Spline
CA01050S-Kit
The Crane Axle GM 14-Bolt 30-Spline Billet Spindle & Aluminum Hub Kit combines our 4140 billet spindles, 6061 billet aluminum wheel hubs, wheel bearings, seals, and spindle hardware into one complete wheel-end package for custom GM 14-Bolt full-float axle builds. Instead of sourcing each component separately, builders get a matched package designed around the proven OE-style GM 14-Bolt spindle and wheel bearing system.
The 4140 billet spindles provide a strong, precision-machined foundation for factory and fabricated axle housings, while the aluminum hubs remove rotating and unsprung weight compared with heavy factory-style hubs. The included bearings, races, seals, and spindle nut hardware complete the package with serviceable components that make sense for rock crawlers, rock bouncers, Ultra4 cars, trail buggies, and other high-performance 14-Bolt axle builds.
Includes:
- (2) Crane Axle GM 14-Bolt 30-Spline 4140 Billet Spindles
- (2) Spindle Nut Spacers
- (2) Crane Axle GM 14-Bolt 30-Spline 6061 Billet Aluminum Wheel Hubs
- (2) Inner Wheel Bearings & Races
- (2) Outer Wheel Bearings & Races
- (2) Axle Seals
- (2) Spindle Nuts with Pins
- (2) Keyed Washers
- (2) Lock Nuts
- Bearing Races Pre-Installed in Aluminum Hubs
Specifications
| Specification | Details |
|---|---|
| Manufacturer | Crane Axle |
| Axle Platform | GM 14-Bolt Full-Float |
| Wheel-End Type | Spindle & Wheel Hub |
| Hub Spline Count | 30-Spline |
| Spindle Material | 4140 Billet Steel |
| Spindle Outside Diameter | 3.00" |
| Recommended Axle Tubing | 4.00" OD x .500" Wall |
| Maximum Housing Bore | 3.00" I.D. |
| Hub Material | 6061 Billet Aluminum |
| Wheel Bearings | OE-Style GM 14-Bolt |
| Wheel Seals | OE-Style GM 14-Bolt |
| Bearing Races | Pre-Installed in Hubs |
| Housing Compatibility | Standard Smooth, Metric Ribbed & Custom Fabricated |
| Axle Position | Rear / Non-Steering |
| Installation Type | Fabrication / Axle Assembly Required |
| Quantity | Complete Pair / Both Wheel Ends |
| Manufacturing | Spindles & Hubs Precision Machined in the USA |
Fitment
Designed For:
- GM 14-Bolt full-float rear axle builds
- Custom fabricated GM 14-Bolt axle housings
- Standard smooth GM 14-Bolt housings
- Metric ribbed GM 14-Bolt housings
- 30-spline rear axle configurations
- Rock crawlers and trail buggies
- Rock bouncers
- Ultra4 and competition off-road builds
Fitment Notes:
- Designed as a complete wheel-end package for both sides of the axle
- Billet spindles feature a 3.00" outside diameter
- Compatible with fabricated axle housings with up to a 3.00" I.D. bore
- Commonly used with 4.00" OD x .500" wall axle tubing
- Uses OE-style GM 14-Bolt wheel bearings and axle seals
- 30-spline aluminum hubs are designed for matching GM 14-Bolt axle shaft configurations
- Final axle shaft, differential, brake, wheel bolt pattern, and housing compatibility must be verified for the complete axle assembly
Additional Components Required:
- Axle shafts
- Differential and internal axle components
- Brake system
- Wheel studs
- Gear oil and assembly lubricants
FAQ
What is included in this GM 14-Bolt wheel-end kit?
This package includes the billet spindles, aluminum wheel hubs, inner and outer wheel bearings and races, axle seals, spindle nut spacers, and spindle nut hardware required for both sides of the axle. It gives builders the major spindle-to-hub components needed to assemble a GM 14-Bolt full-float rear wheel end.
Why use aluminum hubs instead of factory GM 14-Bolt hubs?
The Crane Axle 6061 billet aluminum hubs reduce rotating and unsprung weight compared with heavy factory-style hubs. Reducing wheel-end mass helps the suspension react more effectively while decreasing the mass the drivetrain has to accelerate and the brakes have to slow down.
What is the advantage of the Crane Axle 4140 billet spindles?
Crane Axle machines these spindles from solid 4140 billet steel rather than relying on used factory cast spindles. This provides a new, dimensionally consistent spindle foundation for fabricated and high-abuse axle builds while retaining the serviceability of OE-style GM 14-Bolt bearings and seals.
Are the wheel bearing races already installed?
Yes. The bearing races are pre-installed in the Crane Axle aluminum wheel hubs. The kit also includes the matching inner and outer wheel bearings and axle seals for both wheel ends.
Is a 30-spline GM 14-Bolt axle shaft smaller than a 35-spline axle shaft?
No. Spline count alone does not determine axle shaft diameter. A factory-style GM 14-Bolt 30-spline axle shaft is approximately 1.550" in diameter, while the common aftermarket 35-spline shaft is approximately 1.500". This is why comparing axle strength based only on spline count can be misleading.
Does this kit include axle shafts?
No. Axle shafts are sold separately. This wheel-end package is designed around a 30-spline GM 14-Bolt configuration, so axle shaft length, spline configuration, differential compatibility, and overall axle width must be determined for the individual build.
Does this kit include brakes?
No. Brake components are sold separately. This allows the builder to select a brake package based on vehicle weight, wheel size, intended use, and the complete axle configuration.
Can this kit be used with a fabricated axle housing?
Yes. The billet spindles feature a 3.00" outside diameter and can be used with custom fabricated axle housings with up to a 3.00" I.D. bore. A common combination is 4.00" OD x .500" wall axle tubing.