Dorman 697-313 Differential Ring and Pinion - Rear

Differential Ring and Pinion for Ford 3.73 Axle Applications

The Dorman 697-313 differential ring and pinion is a standard replacement for specific rear axle applications that use a 3.73 gear ratio and a 7.5-inch ring gear. It restores the original gear set configuration for Ford Mustang, Ranger, Explorer, and other listed vehicles with the correct axle setup.

• Gear ratio: 3.73
• Standard replacement grade for OE-style service
• Direct replacement for specific rear differential applications
• Package contents: ring gear and pinion gear
• Compatible with 7.5-inch ring gear setups
• Part number: 697-313

Detailed Product Overview

Dorman 697-313 is built for rear differential service on vehicles originally equipped with a 3.73 axle ratio. It is a direct replacement for the factory ring and pinion on select Ford Mustang, Ford Ranger, Ford Explorer, Ford Thunderbird, Mercury Cougar, and other listed rear axle applications. This part cross-references B7AZ4209A for the same application. Use 697-313 when replacing worn or damaged gears in a 7.5-inch rear differential that matches the original ratio and fitment.

Common Problems This Part Addresses

• Gear whine or noise from worn differential gears
• Loss of correct axle ratio after gear damage
• Backlash or mesh issues caused by worn ring and pinion teeth
• Rear differential performance problems after drivetrain wear
• Need to restore factory-style gearing on a 3.73 axle setup

Installation Notes and Fitment Tips

• Fits 1979-2010 Ford Mustang, rear, w/3.73 axle ratio; 7.5 in. ring gear
• Fits 1983-2010 Ford Ranger, rear, w/3.73 axle ratio; 7.5 in. ring gear
• Fits 1991-1997 Ford Explorer, rear, w/3.73 axle ratio; 7.5 in. ring gear
• Fits 1980-1997 Ford Thunderbird, rear, w/3.73 axle ratio; 7.5 in. ring gear
• Fits 1980-1997 Mercury Cougar, rear, w/3.73 axle ratio; 7.5 in. ring gear
• Fits 1990-1997 Ford Aerostar, rear, w/3.73 axle ratio; 7.5 in. ring gear
• Fits 1984-1990 Ford Bronco II, rear, w/3.73 axle ratio; 7.5 in. ring gear
• Fits 1984-1987 Lincoln Mark VII, rear, w/3.73 axle ratio; 7.5 in. ring gear
• Fits 1979-1986 Mercury Capri, rear, w/3.73 axle ratio; 7.5 in. ring gear
• Fits 1981-1986 Mercury Marquis, rear, w/3.73 axle ratio; 7.5 in. ring gear
• Fits 1978-1983 Ford Fairmont, rear, w/3.73 axle ratio; 7.5 in. ring gear
• Fits 1978-1983 Mercury Zephyr, rear, w/3.73 axle ratio; 7.5 in. ring gear

Verify axle ratio, ring gear diameter, and rear differential configuration before installation. Professional setup is recommended because ring and pinion installation requires precise gear pattern, backlash, and bearing preload adjustment.

Quality Assurance

Dorman supplies this part as a standard replacement component for direct-fit service on the listed applications. Part number 697-313 is engineered to match the original equipment configuration for the specified rear axle use.