| Business | Phone |
| Winkler Automotive Svc Ctr 401 E Diamond Ave, Gaithersburg 20877 | (301) 258-2774 |
| Trans Tech 19314 Woodfield Rd, Gaithersburg 20879 | (301) 840-8555 |
| Craven Transmission 18909 Bonanza Way, Gaithersburg 20879 | (301) 590-0444 |
| Fourcade Transmissions 8100 Beechcraft Ave # D, Gaithersburg 20879 | (301) 963-9841 |
| Halota Enterprises Inc 943 N Frederick Ave, Gaithersburg 20879 | (301) 921-0311 |
| Hatola Enterprises 943 N Frederick Ave, Gaithersburg 20879 | (301) 921-0973 |