Tri-State Machine, Inc. has over 25 years of experience in the manufacture and overhaul of traction gear units.  We have been entrusted by the major transportation companies and U.S. transportation authorities to deliver OEM products. Tri-State Machine offers complete assembly, overhaul, “no-load” testing, painting and kitting services.  With our unique ability to manufacture replacement components, we pride ourselves on quick turnaround to get your valuable equipment back into service.