Yukon Gear & Axle YGK2339 Muscle Car Re-Gear Kit GM 8.5" 4.11 Ratio with Limited Slip

The Yukon Gear & Axle YGK2339 is a complete muscle car re-gear and limited slip package designed for GM 8.5-inch 10-bolt rear differentials. This comprehensive kit dramatically improves traction, durability, and acceleration by combining a high-performance 4.11 ratio ring and pinion set with a Yukon Dura Grip limited slip differential.

Key Features:

• Complete re-gear kit for GM 8.5-inch rear differential
• 4.11:1 ring and pinion gear set for improved acceleration and low-end torque
• Yukon Dura Grip 28-spline limited slip differential (positraction)
• 30-spline pinion gear for enhanced strength
• 10-bolt ring gear design
• 2.25-inch OD axle bearings included
• Complete master installation kit with all bearings, seals, and hardware
• Engineered to exceed OE specifications for quiet operation and longevity

This all-in-one kit provides everything needed for a professional differential upgrade in one convenient part number. The Dura Grip limited slip unit delivers smooth yet aggressive traction for improved performance on the street or strip. The 4.11 gear ratio is ideal for muscle car applications, providing excellent acceleration while maintaining reasonable highway cruising. Fits classic GM muscle cars including 1970-1981 Firebird Trans Am, 1970-1977 GTO, and many other GM vehicles equipped with 8.5-inch rear ends.

Yukon Gear & Axle products are manufactured using premium materials and precision tolerances that meet or exceed original equipment standards. Proven in extreme conditions from rock crawling to drag racing, Yukon drivetrain components deliver the quality and performance enthusiasts demand.