Ford M5OD/M5R1 Transmission Synchro Ring Kit 1987-00 5th/Rev Tooth Count 36 Ranger, Bronco ll, Explorer & Aerostar Van 2x2 or 4x4 5 speed manual transmission. You can identify this transmission by tags on the side "E87A, E97A, FO7A, F17A" This transmission has an aluminum case and aluminum top cover. Note this transmission is called the M5R1 or M5OD. Note: you will want to confirm the number of teeth on your 5th and reverse slider to insure you are purchasing the correct synchro kit. The slider will have 30 teeth or 36 teeth and the synchro rings we send you will be based on this information. This kit is for the 36 tooth count 5th/rev slider; if you need the 30 tooth count please see our other listing.