TTA has, throughout its history, successfully overhauled, remanufactured to exacting requirements and schedules almost every sub system and component that comprises a rail passenger car, from the largest sub systems to the smallest components.

TTA leads the industry in this area of business, and continuing to expand its capabilities to respond to customers requirements and needs.

Customer	Project
Chicago CTA – 2600 series	Overhaul and remanufacture of subsystems and components including: 597 Master Controllers 2388 GE Gear Units 2388 Current Collectors 2388 Track Brakes 2388 Doors 2388 Door Operators 2388 Door Control Panels 597 Main Auxillary Boxes
Baltimore MTA	100 Motor Control Boxes 100 Master Controllers 100 Semi-Conductor Boxes 100 Line Switch Boxes