Relier Pairs mechanical gearbox Version en ligne aprender las partes de la caja mecanica en ingles par cristhian david diaz arevalo 1 gearbox packaging 2 gearbox housing 3 secondary tree 4 bearings 5 differential crow 6 reverse 7 output shaft 8 thrust bearing 9 primary tree 10 synchronizing rings 11 crazy pinion 12 gear lever 13 change selector 14 input shaft 15 change selector insurance springs 16 attack pinion 17 differential 18 crankcase gearbox