Synchronizer Blocking Ring Set 66-79 CJs, 66-84 SJ, J-Series, 66-71 C101 w/ T18 Crown Automotive3rd and 4th Gear Synchronizer Blocking Ring Set 1966 1979 CJ 5, CJ 6, CJ 7,1966 1984 SJ, J Series, 1966 1971 C101 Commando, All w T18 Transmission, Includes 2 Blocking Rings Features and Benefits: 12 Month Warranty 3rd and 4th Gear Synchronizer Blocking Ring Set Direct Replacement Includes 2 Blocking Rings Use Existing Hardware Details: Material: Bronze Color: Bronze Location: Front & Rear Hardware Included: Use Existing Hardware Application: 1966