Jeep T18 Transmission Rebuild Kit This is a transmission rebuild kit for the Jeep T18 4 speed Transmission for the years 1966-85 You can identify this transmission by the casting "T18" or "13-01" and it has an iron case. NOTE: It is important to measure the key slots for your 3rd and 4th synchro rings to make sure you get the correct rebuild kit. This rebuild kit comes with 3rd and 4th synchro rings that have 10mm key slots. If your 3rd and 4th synchro rings have 13mm key slots, please see my other listings for the correct kit for you. This kit includes all new bearings, seals, gaskets & high quality synchro rings. Also Included is the Small parts kit that has the snap rings, washers, needle rollers, etc.