Aussie Locker Ford 9" The Aussie Locker is an insert you fit into the existing differential housing that locks the wheels 100% when the gas is applied. With the help of this pre-tensioned insert, you can easily remove an old insert and this fits directly into the original housing. Dimensions : 9 × 6 × 3 in / 22.8 x 15.2 x 7.6 cm Weight : 6lb / 1.7kg Fits: Listed below and more with Ford 9" with 31 splines. 19661986 Ford Bronco 19681983 Ford E150 19791988 Ford E150 19681974 Ford E200 19751980 Ford E250 19751983 Ford F100 19681987 Ford F150 19571971 Ford Fairlane 19601970 Ford Falcon 19591974 Ford Galaxy 19751979 Ford Granada 19651979 Ford LTD 19701978 Ford Maverick 19651973 Ford Mustang 19571979 Ford Ranchero 19551979 Ford Thunderbird 19681976 Ford Torino 19681976 Ford Grand Torino 19571979 Lincoln Continental 19681971 Lincoln Mark III 19641977 Mercury Comet 19671979 Mercury Cougar 19751980 Mercury Grand Marquis 1977