| S.no | Company Name | Founded | Country |
|---|---|---|---|
| 1 | Cleveland Gear Co. | USA | |
| 2 | Merkle-Korff Industries A Nidec Company | USA | |
| 3 | Ross Engineering Corp. | USA | |
| 4 | Tsubaki of Canada Limited | USA | |
| 5 | Cotta Transmission Co. | USA | |
| 6 | GearTechnic Corp. | USA | |
| 7 | Orbital Traction Ltd. | USA | |
| 8 | Candy Manufacturing Co. Inc. | USA | |
| 9 | Allison Transmission Holdings Inc | USA | |
| 10 | Torque Transmission | USA | |
| 11 | Xtrac | USA | |
| 12 | Bosch Rexroth Corp. | USA | |
| 13 | Turner Uni-Drive | USA | |
| 14 | Delta Research Corp. | USA | |
| 15 | Rouse Industries.com | USA | |
| 16 | Dartco Transmission Sales & Service Inc. | USA | |
| 17 | Tecmotiv Corp. | USA |
