One of Contra Costa County's most referred Transmission shops Thank you for your interest in our services. You may contact us by phone during working hours at 925-685-3575   Diablo Transmission was founded by Ray and Laura Warner. Ray has more than 25 years of experience in the transmission industry. The Warner family has been active and committed to our community for decades, involved youth sports and volunteer organizations. Ray writes auto repair management articles for the transmission industry's leading publication GEARS. Diablo Transmissions is located at: 1410 Concord Ave Concord, Ca, 94520. Work is performed by experienced ASE Certified Technicians.

Customer Service Our goal is to provide customer service that is so good it will surprise you! With that in mind, we offer the following online features: Feedback: Send a message directly to the owner of Diablo Transmissions. Comment upon your experience with us. Tell us what we did well and scold us if we failed in any detail. Your comments will be taken to heart. How we do business in the future will be based upon your input. Request A Quote: Online quotes. No haggling, no surprises, nothing hidden. Quick reply. Make an Appointment: Tell us when you can most conveniently bring us your car. Arrange towing or a rental car if necessary. Wholesale Accounts Register: Free registration for credentialed wholesale customers. Repair shops, fleet operators, and car dealers are eligible. Register for confidential pricing and on-the-spot delivery.                           Three generations of the Warner family are active in the Concord community. Business owners, sponsors for sports teams, active in local schools, the family is solidly part of the community. Ray has lived in the Concord area since 1964 and graduated from Clayton Valley High School in 1977. Even before graduation, at 16 years old, Ray started working on automatic transmissions. SInce then he has developed expertise in all areas of the business, having performed every task related to an automatic transmission shop's operation. Since first opening his own shop in 1984, Ray has focused on customer service. Some might say he is compulsive about offering every service detail possible. Under Ray's direction, and unlike most independent repair facilities, Diablo Transmissions offers shuttle service to and from the shop, financing when needed, extended warranties, and an exclusive line of factory rebuilt trnasmissions, all in addition to the onsite repairs traditionally done by automatic transmission shops. Ray's writing in GEARS Magazine has won him a Silver Medal from International Automotive Media Awards for a series of articles on transmission repair. Speaking engagements, daily retail business, a wholesale transmission distribution, teaching for ESi Automotive Business Consultants, father, husband (whew!), Ray is a little busy. Yet, when a customer needs something in a hurry, Ray is apt to be the one to make it happen. His dedication to service is impressive!