"The" Transmission Experts! Located In Garland, Plano, Lewisville & McKinney. The Transmission Shop serves all of Dallas County, Denton County, Collin County, and Rockwall County, as well as Goodyear, the City of Lewisville, and Christian Brothers Automotive. Family Owned & Operated. We Dare You To Compare Our Price, Quality, Warranty Plans and our BBB A Plus Rating.