Yukon Gear Dura Grip Positraction for GM 12 Bolt Car, 30-Spline, 4.10+ Ratio (Select 1964-1973)

Fits select 1964-1973 Buick, Chevrolet, and Pontiac vehicles equipped with a GM 12-bolt passenger car differential (12P), 30-spline axles, and a 4.10 or higher (numerical) gear ratio.

The Yukon Gear Dura Grip is a clutch-style positraction limited-slip differential (LSD) designed to provide smooth yet aggressive traction for street and performance applications. Engineered for durability, the Dura Grip utilizes a high-strength nodular iron case and forged 4320 chromoly spider gears to handle high-torque loads and ensure reliable power delivery. The internal composite clutches provide consistent friction to minimize wheel spin and maximize grip across various road and track conditions.

Designed for long-term serviceability, this unit (MPN: YDGGM12P-4-30-1) is fully rebuildable. Whether restoring a classic muscle car like a Camaro, Chevelle, or GTO, or building a high-performance street machine, the Dura Grip provides the strength and confidence required for modern performance standards.

• Fits GM 12-bolt passenger car (12P) differentials
• Designed for 30-spline axles and 4.10 gear ratios and up
• Forged 4320 chromoly spider gears for superior tooth strength
• High-strength nodular iron case construction
• Premium composite clutches for smooth engagement
• Fully rebuildable design
• Assembled in the USA
• Manufacturer Part Number: YDGGM12P-4-30-1