| Business | Phone |
| Automotive Packaging Corp 4300 Cabot St, Detroit 48210 | (313) 582-3111 |
| Dearborn Gear & Tool Co 4300 Cabot St, Detroit 48210 | (313) 581-3114 |
| Metro Gear & Spline 18380 Fitzpatrick St, Detroit 48228 | (313) 835-0503 |
| Modified Gear & Spline Inc 18300 Mount Elliott St, Detroit 48234 | (313) 893-3511 |