Use 23985-12 key (MCS 517945). Use 24023-36 JIMS nut (MCS 978258) for flywheel side and 24023-54 JIMS nut (MCS 978263) for pinion gear side. Comes with oil end plug. Side oiling. Repl. 24006-54A. Tech tip: 58-81 B. T. pinion shaft assemblies also fit 54-57 B.T. when the stock pressed-in bearing race is removed and the cast-in bearing retainer is bored out to accept the larger 58-81 press-in bearing race (OEM 24599-58B / MCS 518110).
