Built for the GM 8.2 in. 10-Bolt rear axle, the EXCEL from Richmond GM82411 4.11 ratio ring and pinion replaces worn factory gears or changes the final drive to suit larger tires, added weight, or a different engine combination. It fits select Chevy, GMC, Pontiac & Buick vehicles from 1964 to 1972; the complete vehicle application list appears below. It is produced to OE tooth geometry in 8620 Steel and supplied as a matched set. Note that it calls for a 3.08 Ratio and Higher carrier. Correct pinion depth, preload, and backlash setup is required for quiet operation and long gear life.

EXCEL from Richmond GM82411 4.11 Ratio Rear Ring and Pinion Gear Set Features:

• Designed for the GM 8.2 in. 10-Bolt rear axle
• 4.11:1 final drive gear ratio
• 41-tooth ring gear paired with a 10-tooth pinion
• 25-spline pinion shaft accepts the matching pinion yoke
• Pinion shaft diameter: 1.438 in.
• Ring gear rotation: Standard
• Ring gear material: 8620 Steel
• Requires a 3.08 Ratio and Higher carrier
• Professional installation is recommended: pinion depth, bearing preload, and backlash must be set and confirmed with a gear marking compound pattern check, followed by a proper gear break-in.

EXCEL from Richmond GM82411 Vehicle Applications:

• 1964-1972 Chevy Bel Air
• 1964-1972 Chevy Biscayne
• 1969-1972 Chevy Brookwood
• 1967-1970 Chevy Camaro
• 1966-1971 Chevy Caprice
• 1964-1972 Chevy Chevelle
• 1964-1968 Chevy Chevy II
• 1964-1972 Chevy El Camino
• 1964-1972 Chevy Impala
• 1970-1972 Chevy Monte Carlo
• 1969-1972 Chevy Nova
• 1971-1972 GMC Sprint
• 1969-1972 Pontiac Firebird
• 1970-1972 Pontiac GTO
• 1964-1970 Pontiac Tempest
• 1971 Pontiac Ventura
• 1964-1970 Buick Wildcat