https://api.edmunds.com/api/vehicle/v2/transmissions/200478100?fmt=json&api_key={api key}

{
  "id": "200478100",
  "name": "5A",
  "equipmentType": "TRANSMISSION",
  "availability": "OPTIONAL",
  "automaticType": "Shiftable automatic",
  "transmissionType": "AUTOMATIC",
  "numberOfSpeeds": "5"
}