Yukon Gear & Axle YGK2338 Muscle Car Re-Gear Kit GM 8.5" 3.90 Ratio with Limited Slip

The Yukon Gear & Axle YGK2338 is a complete muscle car differential upgrade kit designed for GM 8.5" rear axles with 28-spline applications. This comprehensive package combines performance gearing with improved traction in a single, convenient part number.

Complete Kit Includes:

• High-performance 3.90 ratio ring and pinion gear set
• Yukon Dura Grip limited slip differential (positraction unit)
• Premium Timken bearings and races
• All required seals and installation hardware

Performance Benefits:

• Dramatically improves rear-wheel traction and durability
• Optimizes acceleration with a more aggressive 3.90 gear ratio
• Engineered with advanced heat-treating techniques for extreme durability
• Designed to run cooler and quieter than stock gears
• Built to withstand high horsepower and demanding conditions

Application Details:

• Fits GM 8.5" differentials with 28-spline configuration
• 8.50" ring gear diameter with 10 mounting bolts
• 30-spline pinion gear
• Ideal for classic muscle cars including '70-'81 Firebird Trans Am, '70-'77 GTO, and other GM A-body, G-body, and F-body vehicles

Yukon Gear & Axle uses state-of-the-art design and manufacturing processes to ensure each component meets or exceeds OEM specifications. The precision-machined gear tooth surface finish reduces friction and heat buildup, while the high-grade steel construction delivers unmatched reliability on the street or track. Backed by a one-year warranty with optional Yukon Extended Service (Y.E.S.) Plan available for comprehensive lifetime coverage.