About us

Rohnert Park Transmission would like to welcome you to our website. We are Sonoma County’s number one automatic transmission repair shop. Every single transmission technician at our shop is extremely trained and prepared to offer their professional expertise & ability for your transmission repair need.

Rohnert Park Transmission is a locally family owned & operated business, we strongly believe in giving every customer the best possible service at a fair price. We dedicate ourselves to being the best automotive facility in Sonoma county.

Affiliations & Certifications


Rohnert Park Transmission understands how important it is to find a quality transmission service and repair facility. This is why we value the associations we have with the reputable organizations listed below. These associations help our transmission service & repair facility to give you the confidence in knowing that your automotive repair and service needs will be met by our qualified automotive repair and service expert technicians.

Atra Certified Techniciansatra_certified 2


ATRA is a nationally recognized association that encourages technical competency and a high standard of professionalism in the automatic transmission repair industry. ATRA Certified logo displayed on an ATRA Shop means there are ATRA Certified technicians that have passed tough industry tests to verify their technical knowledge. ATRA certified technicians must be retested every five years.


 Automatic Transmission Rebuilders Association

ATRA – the Automatic Transmission Rebuilders Association – is an international trade association for the professional automatic transmission repair industry. With members across the US and Canada, ATRA’s network of automatic transmission repair professionals can offer you repair and warranty coverage anywhere you are likely to drive. Because, wherever you go – from coast to coast – there is always an ATRA member nearby. With nearly 2000 members, ATRA is larger than every automatic transmission repair chain combined – nearly three times the size of the largest chain in the US. Which means that no chain can provide better warranty coverage than ATRA’s network of professional service centers. Every ATRA member must adhere to ATRA’s Code of Ethics – ATRA’s standards for providing honest, professional service. So, when you take your car to an ATRA member, you are assured of polite, professional service, at an honest price. And not just automatic transmission repair: most ATRA members also provide diagnostic and repair service for manual transmissions, clutches, differentials, driveshafts, drive axles, and transfer cases. Which all boils down to one inescapable conclusion: If your car starts but does not move, you need to call your nearby ATRA member – right away!

Automotive Service Councils of Californiaascca-logo

ASCCA is the largest independent garage owners association in California. The core purpose of ASCCA is to elevate and unite automotive professionals, and give them voice in a way that promotes integrity, compassion, individuality and continuous self-improvement. Membership in ASCCA is unique in that it is comprised of 28 chapters throughout California and is based on the time-honored values of small business owners.


transgo   TransGo

TransGo has provided engineering solutions for the automatic transmission repair industry since 1959.

We are proud to be apart of the Rotary Club of Rohnert Park-Cotati. We work to bring together our community & provide opportunities.


Founded in 1978, Sonnax has become a leading supplier to the automotive aftermarket. The company designs, manufactures and distributes replacement components for automatic transmissions, torque converters, drive shafts and related products worldwide. ln addition to serving the passenger vehicle aftermarket, Sonnax also has strong product offerings for the high performance and heavy-duty markets.



Transtar Industries, Inc., headquartered in Cleveland, Ohio, is the leading aftermarket transmission parts supplier to the automotive repair industry. Transtar has over 60 locations in the US, Puerto Rico, and Canada, and an international division that serves more than 70 countries around the globe.


Our transmission repair shop welcomes others with great auto repair websites to join our link exchange.


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