Essortment.com recommended ATRA when choosing transmission repair. Read the full article here:
Second, check to see if the repair shop belongs to organizations such as the American Automobile Association (AAA), the Better Business Bureau, or the Automatic Transmission Rebuilder’s Association (ATRA), an organization that requires its members
to adhere to ethical codes when dealing with consumers. ATRA and AAA
can provide you with a listing of car repair garages in your local area
if you don’t get a recommendation from friends or family.