我们遇到这样一个问题,有一辆外地东风牌汽车在某一修理厂修理变速器后挂不上二档。拆开变速器后,检查拨叉、拨叉轴、自锁及互锁等零件均正常;齿轮轮齿几乎无磨损;取下同步器,也未发现有何缺陷。于是又原样装回,经试车故障依旧。无奈重新拆开变速器,经仔细检查,发现同步器锥环锥面中部有一 We have encountered such a problem, a foreign Dongfeng brand car repair gearbox in a repair shop after the second gear. Disassemble the transmission, check the fork, fork axis, self-locking and interlocking parts are normal; gear teeth almost no wear; remove the synchronizer, also found no defects. So it was loaded back, the test car failure still. Reluctantly re-opened the transmission, after careful examination and found that there is a conical cone Central Synchronizer