The EXCEL from Richmond F9411 is a 4.11 ratio ring and pinion gear set built for the Ford 9 in. rear axle. Swapping in a different gear ratio is one of the most direct ways to change how a vehicle accelerates, tows, and cruises, and it is also the fix when a worn or chipped set starts to whine or clunk under load. It fits select Ford, Lincoln & Mercury vehicles from 1955 to 1988; the complete vehicle application list appears below. The ring gear is machined from 8620 Steel and the ring and pinion are supplied as a matched set that must be installed together.

EXCEL from Richmond F9411 Compatibility Notes:

• Designed for the Ford 9 in. rear axle
• 4.11:1 final drive gear ratio
• 37-tooth ring gear paired with a 9-tooth pinion
• 28-spline pinion shaft accepts the matching pinion yoke
• Pinion shaft diameter: 1.313 in.
• Ring gear bolt quantity: 10
• Fits the Dropout-bolt differential cover housing
• Ring gear rotation: Standard
• Ring gear material: 8620 Steel
• 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 F9411 Vehicle Applications:

• 1966-1986 Ford Bronco
• 1957-1959 Ford Club
• 1957, 1969-1974 Ford Country
• 1969-1974 Ford Country Squire
• 1969-1983 Ford E-100 Econoline
• 1975-1983 Ford E-100 Econoline Club Wagon
• 1975-1988 Ford E-150 Econoline
• 1975-1988 Ford E-150 Econoline Club Wagon
• 1969-1974 Ford E-200 Econoline
• 1975-1980 Ford E-250 Econoline
• 1975-1980 Ford E-250 Econoline Club Wagon
• 1975-1976 Ford Elite
• 1957-1983 Ford F-100
• 1975-1987 Ford F-150
• 1957-1970 Ford Fairlane
• 1960-1970 Ford Falcon
• 1959-1967 Ford Galaxie
• 1962-1974 Ford Galaxie 500
• 1972-1976 Ford Gran Torino
• 1975-1980 Ford Granada
• 1965-1979 Ford LTD
• 1977-1979 Ford LTD II
• 1970-1977 Ford Maverick
• 1965-1973 Ford Mustang
• 1957, 1963-1964 Ford Ranch Wagon
• 1957-1979 Ford Ranchero
• 1957-1959 Ford Skyliner
• 1963-1964 Ford Sprint
• 1960 Ford Starliner
• 1957-1959 Ford Sunliner
• 1955-1979 Ford Thunderbird
• 1968-1976 Ford Torino
• 1957-1959 Ford Victoria
• 1958-1979 Lincoln Continental
• 1957 Lincoln Mark II
• 1968-1971 Lincoln Mark III
• 1977-1980 Lincoln Versailles
• 1964-1969, 1971-1977 Mercury Comet
• 1967-1979 Mercury Cougar
• 1975-1980 Mercury Grand Marquis
• 1963-1966, 1969-1970 Mercury Marauder
• 1967-1980 Mercury Marquis
• 1968-1976 Mercury Montego
• 1964-1965 Mercury Villager