Ford 3 Speed with Overdrive Manual Transmission Synchro Kit from 1981-87 These synchro rings are rings we sell everyday to Transmission Shops, it fits the Ford 3 Speed with Overdrive Transmissions 1981-87 that can be found in Ford E-Series Vans, F-Series Trucks, P-Series Vans and Full Size Broncos. You can identify this transmission by the aluminum case, 10 bolt tin top cover, and it has overdrive. This transmission is known as SROD, RTS or "Ford Top loader" and can be found in RWD and 4WD applications. This kit comes with all of the synchros for each gear. SRK112