Yukon 30-Spline GM 14-Bolt Steel Spool 4.10 & Down
SKU: YPFSGM14T-3-40
Yukon Performance Spools are built from high-quality steel to deliver maximum strength and durability in extreme off-road and competition use. This GM 14-Bolt 30 Spline Spool replaces the factory differential, locking both rear wheels together for full-time traction. Ideal for trail rigs, mud trucks, and rock bouncers running 10.5 14 Bolt axles.
Includes:
- (1) Yukon 14 Bolt 30 Spline Steel Spool
- Features:
- Fits GM 10.5 14 Bolt truck axles with 30 spline shafts
- Compatible with 4.56 & up thick gears
- Provides 100% traction to both rear wheels at all times
- Precision-machined steel construction for maximum strength
- Designed for performance and off-road applications
- Not recommended for street-driven vehicles
Specifications
| Specification | Detail |
|---|---|
| Brand | Yukon Gear & Axle |
| Material | Steel |
| Axle Type | GM 10.5 14 Bolt Truck |
| Spline Count | 30 Spline |
| Gear Ratio Compatibility | 4.56 & Up (Thick Gears) |
| Traction Type | Full Spool (Locked 100%) |
| Recommended Use | Off-Road / Competition Only |
Fitment
| Year | Make | Model |
|---|---|---|
| 1973 – 2020 | Chevrolet | C20 / C30 / K20 / K30 / Silverado 2500 / Silverado 3500 |
| 1973 – 2020 | GMC | C25 / C35 / K25 / K35 / Sierra 2500 / Sierra 3500 |
| 1975 – 1993 | Chevrolet / GMC | Suburban 2500 / 3500 |
| 1975 – 1993 | Chevrolet / GMC | Van G30 / G35 |
| 1973 – 1991 | Chevrolet | Blazer / K5 (with 14 Bolt Rear Swap) |
Tech Insight
A spool completely replaces the stock differential carrier, locking both axles together so they spin at the same speed. This design eliminates wheel slip and ensures consistent traction under extreme load — ideal for off-road rock crawlers, drag racing, and mud trucks. However, because it prevents differential action, it causes tire scrub and driveline stress on pavement, making it unsuitable for street use. Yukon’s precision machining and steel construction make it one of the strongest spools available for the GM 14 Bolt platform.