New OEM Tuff Torq hydrostatic transmission repair kit. Fits Tuff Torq TZT-7 zero-turn transaxles. Includes piston assemblies, center case, seals, o-rings, oil filter and case sealant. For right side only (when sitting on mower). Compatible with John Deere transaxle part numbers AUC15342, AM140314 and MIA12729. If unsure of compatibility, please contact us with serial numbers to verify.