Yukon Gear & Axle YPFST100-30 Performance Steel Spool 8.4in 30-Spline

The Yukon Gear & Axle YPFST100-30 Performance Steel Spool is engineered for Toyota T100 vehicles with 8.4-inch differentials, providing 100% lockup for maximum traction in demanding applications. This full spool replaces the entire differential carrier assembly, eliminating the spider gears and forcing both axle shafts to rotate at the same speed at all times.

Key Features:

• Constructed from premium 8620 steel for exceptional durability
• Heat-treated for added strength and wear resistance
• 30-spline configuration for Toyota T100 8.4-inch rear differentials
• Direct replacement for stock differential carrier assembly
• Cost-effective alternative to limited-slip or locking differentials
• Straightforward installation process

Application: This spool is specifically designed for dedicated off-road and drag racing vehicles. Because it provides permanent 100% lockup with no differentiation between wheel speeds, it is not recommended for street use. Ideal for rock crawling, mud racing, and straight-line acceleration where maximum traction is critical.

Important Note: Spools should only be installed in vehicles used exclusively for racing or off-road competition. On-road use will result in tire wear, driveline stress, and poor handling characteristics during turns.