Transmission swichable between forward 6 steps and 7 steps

The present invention 6 or 7, select any gear stages of the stage and also a front-wheel-driven forward so that production can significantly reduce the production cost to ever be in one of the transmission production lines 6, 7 on the optional manual transmission that, the first and the sixth stage drive gear arrangement from one stage to the input shaft, an output shaft, the top 3 · 4 · 7 · R-stage driven gear is a lower output shaft is provided with 1, 2, 5, 6-speed driven gear. At this time, the engagement is a 5-stage drive gear as the driven gear 7 is optional. Transmission, vehicle, engine, transmission, differential, synchro mesh mechanism