This Yukon 30-spline steel spool for GM 10.5" 14-Bolt rear axles is built for maximum strength and full-time traction in extreme off-road and competition environments. Replacing the factory differential, it permanently locks both rear wheels together to ensure equal power delivery in the most demanding conditions.

Constructed from high-quality steel and precision machined for a perfect fit, this spool is ideal for rock bouncers, mud trucks, and dedicated trail rigs. It eliminates differential action entirely, providing consistent traction where it matters most.

Includes:

• (1) Yukon 14-Bolt 30 Spline Steel Spool

Specifications

• Fits GM 10.5" 14-Bolt truck axles with 30-spline shafts
• Compatible with both 4.10 & down gears and 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

Fitment

Tech Insight

A spool replaces the entire differential carrier, eliminating spider gears and permanently locking both axle shafts together. This results in maximum traction but also removes the ability for wheels to rotate at different speeds during turns.

Because of this, spools are best suited for dedicated off-road or race vehicles where traction outweighs street manners. For mixed-use rigs, a selectable locker may be a better option, but for pure performance and strength, a spool is one of the most reliable solutions available.