... Fast gearbox ISO:2000/TS16949 certification equipped in Dongfeng,Howo, Ouman...heavy trucks 1. Heat treament:carburizing and quenching2 ... from American and produce the first rank-highest quality truck gear in China.4. All kinds of gears,welded ... 9JS135,9JS150T,12JS160T ,12JS180T gearbox parts and ZF/HOWO 5S-111GP, 5S-150GP,QJ1206 gearbox parts. NameModel numberTeeth numberpackageSub-gearbox reduction ...