The term 'Transmission Chain' refers to the system of components that work together to transfer power from the engine to the wheels of a vehicle. AAMCO is an American automotive repair chain that specializes in transmission repairs and services. It is one of the largest chains of its kind in the United States, with over 900 locations across the country. AAMCO is known for its expertise in transmission repairs and services, making it an ideal choice for those looking for reliable and quality service.