About this product
USA Standard Gear SL F9-28-31 - Spartan Locker For Ford 9 Inch, 28 Or 31 Spline Axles USA Standard
The Spartan Locker, by USA Standard Gear, provides reliable traction at a low cost. The Spartan locker design does not use the thrust washers and has a revolutionary spring and pin design that makes installation a snap!
- Fits Ford 8 inch and 9 inch with 28 Spline|31 Spline
- Made from 9310 steel for added strength
- Works with stock side gears in standard carrier case
1 year warranty against Manufacturer defects
Technical Notes:
This unit uses the factory side gears and is compatible with 2 and 4 pinion carriers
Features and Benefits:
- Fits Ford 8 Inch and 9 Inch with 28 or 31 spline axles
- Made from 9310 steel for added strength
- Works with stock side gears in standard carrier case
- Mechanical locker delivers reliable 100 percent lockup
Details:
- AAP_UDA_4: 70
- Grade Type: Performance
Fitment Notes:
- Ford 9 inch.
- w/ 28 or 31 Spline Axles
- Spartan Locker
- Installs into standard open carrier case
- uses stock side gears
Application Summary:
1969-1974 Ford E-200 Econoline (Rear)
- 1957-1970 Ford Fairlane (Rear)
- 1960-1970 Ford Falcon (Rear)
- 1959-1967 Ford Galaxie (Rear)
- 1968-1974 Ford Galaxie 500 (Rear)
- 1966-1986 Ford Bronco (Rear)
- 1965-1979 Ford LTD (Rear)
- 1969-1983 Ford E-100 Econoline (Rear)
- 1979-1988 Ford E-150 Econoline (Rear)
- 1975-1980 Ford E-250 Econoline (Rear)
- 1957-1983 Ford F-100 (Rear)
- 1975-1987 Ford F-150 (Rear)
- 1972-1976 Ford Gran Torino (Rear)
- 1975-1979 Ford Granada (Rear)
- 1970-1977 Ford Maverick (Rear)
- 1965-1973 Ford Mustang (Rear)
- 1957-1979 Ford Ranchero (Rear)
- 1955-1979 Ford Thunderbird (Rear)
- 1968-1971 Ford Torino (Rear)
- 1968-1971 Lincoln Mark III (Rear)
- 1958-1979 Lincoln Continental (Rear)
- 1975-1980 Mercury Grand Marquis (Rear)
- 1964-1977 Mercury Comet (Rear)
- 1967-1979 Mercury Cougar (Rear)
Description supplied by Complete Street Performance through its current Shopify listing. Product, performance, and health claims are the seller’s and have not been independently verified by StorkScout.






