T5 World Class 5-Speed Transmission Small Parts Kit The T5 Transmissions will be cast 13-52. Please identify what you have as this small parts kit is for the World Class T5 only! The Non World Class units have all brass synchro rings. World Class transmissions have fiber lined synchro rings for all the synchro rings except 5th. Please make sure your transmission is the World Class T5 before purchasing this small parts kit! This kit comes with all the snap rings, thrust washers, needle bearings, fork inserts etc.