J&M Auto Service is a family-run auto repair shop in Sioux Falls, SD, offering a wide range of services including transmission repair, heavy-duty transmission, sprinter transmission repair, check engine light diagnostics, engine repair, fleet mileage service, oil changes, warranty, wheel alignment, brake repair, and more. With over 25 years of experience and state-of-the-art automotive technology, our ASE Certified Technicians are dedicated to providing stress-free auto repair experiences for all makes and models.