AAMCO Transmissions, Inc. is a transmission repair company with over 800 independently owned and franchised shops throughout the United States, Canada and Puerto Rico. The company is headquartered in Horsham, PA, is recognized as the world's largest franchise system of transmission specialist.Location: 201 Gibraltar Road, Horsham, 19044, PA
X. (508) 580-5431. 3580 Lafayette Rd, Portsmouth, NH 03801. More details. We’re open and here to help – a word to our customers regarding our new safety procedure. TRANSMISSION SERVICES. A Leading Transmission Expert. The AAMCO Transmission Difference.