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High-Performance Transmissions

Are you looking for expert service, the highest-quality products, and a team that will work around the clock to satisfy all of your transmission needs? Then you’ve come to the right place. Mad Dog Transmissions is the leading expert in the automotive industry with legendary transmissions that separate the bold from the meek and the men from the boys! You’ll never have to wonder if you’re getting the best products and services when you trust your transmission needs to us.

We’ve earned our reputation as the best transmission specialists in the business with our exceptional customer care and company promise to always go above and beyond. At Mad Dog Transmissions, our name guarantees that you’ll always experience the best services, products, and development in transmission and automotive technology.

No matter what transmission your vehicle has, we can rebuild it. We rebuild all foreign and domestic transmissions.

Contact Mad Dog

You can reach us at 770-781-0949. We have a transmission expert available to answer your calls from 8AM to 10 PM Eastern Time seven days a week. The shop in Cumming is open Monday through Friday from 8AM to 5PM EST. You may also reach us anytime via email at

In addition to these contact methods, we are also available through all of our social media sites and blog. Message us on Facebook or tweet us! If you need some quick help, our YouTube page is full of helpful videos to help you with your transmission, from choosing the correct stall speed to how you can stop cracking in your transmission case.

Fan Mail

Are you curious what our satisfied customers have to say about us here at Mad Dog Transmissions? Check out some testimonials here and see why they love us!


Are you looking for an expert source for basic transmission support? At Mad Dog Transmissions, we have articles, videos, and tutorials for you. Click here!


We have compiled some of our most frequently asked questions conveniently here on our site. Have a question? Browse our FAQ’s for the answer or give us a call!

Featured Products

We carry only the best high-performance transmissions for the Cumming, GA, area and we will ship both nationally and internationally! All of our products are 100% tested for performance and quality to ensure you’ll be completely satisfied. When you trust your transmission to Mad Dog Transmissions, you can be confident we will help it deliver maximum performance for everyday use.

We feature these transmissions:

Installation and extended warranties are available for our transmissions, and we can also accommodate you if you need a lift gate for delivery. These transmissions come in several standard colors as well as custom colors.

See our shipping info page for information on our shipping rates for our transmissions. We ship free to most places in the United States!