Spartan Helical LSD Dana 30 27-Spline Front Diff

Upgrade your Dana 30 front differential with the Spartan Helical Limited-Slip Differential (LSD) from USA Standard Gear. Engineered with a rugged helical gear design, this unit delivers unmatched traction by automatically transferring power to the wheel with the best grip when slippage occurs—no maintenance required. Its pre-loaded worm gears ensure smooth engagement and linear power distribution, making it ideal for off-road and performance applications.

Built for durability, the Spartan LSD features a forged 8620 steel alloy case and internals, providing exceptional strength and longevity. Designed for 27-spline Dana 30 axles with 3.73:1 ratios or higher, it requires standard 80W-90 GL-5 gear oil (non-synthetic) for optimal performance. Avoid friction modifiers to maintain system integrity.