| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | Pittsburgh Tubular Shafting Inc. | USA | |
| 2 | Quigley Motor Co. Inc. | USA | |
| 3 | Dana Limited | USA | |
| 4 | Walterscheid Inc. | USA | |
| 5 | IFA-Rotorion | USA | |
| 6 | Kaiser Aluminum | USA | |
| 7 | Quality Gear | USA | |
| 8 | Inertia Friction Welding | USA | |
| 9 | Sonnax Transmission Company Inc. | USA | |
| 10 | Delta Gear Inc. | USA | |
| 11 | Cardone Industries Inc. | USA | |
| 12 | Sikky Manufacturing LLC | USA | |
| 13 | ROXIN Driveline Industry Co.Ltd. | USA | |
| 14 | Currie Enterprises Inc. | USA | |
| 15 | Bear’s Performance Inc. | USA | |
| 16 | JTEKT North America Corporation | USA | |
| 17 | Mustang Dynamometer / Mustang Engineering | USA | |
| 18 | CVJ Axles Inc. | USA |
