Trust AAMCO’s Rebuilt Transmission Service. If an AAMCO Transmission Vehicle Courtesy Check determines you need a transmission, you can be confident that the unit that will be installed into your vehicle will provide years of dependable service. You’ll discover AAMCO Transmissions are your most dependable solution whether an AAMCO master builder rebuilds your transmission on-site using only the highest quality AAMCO-approved replacement parts or whether we install a premier replacement transmission from our state-of-the-art AAMCO remanufacturing facility that is renowned for quality and reliability.