Collection: Auto - Transmission Brake Kit

Lock your transmission into both first and reverse gears simultaneously, build massive engine boost off the starting line, and unleash blistering reaction times with our high-end selection of Auto Transmission Brake Kits. At DIY Customs, we provide professional-grade transbrake valve bodies, specialized electronic transbrake kits, heavy-duty activation solenoids, and heavy-duty spring kits designed for a perfect fit inside performance racing automatic transmissions. Whether you are seeking a specialized full manual reverse-pattern transbrake valve body to maximize your drag strip launches, outfitting your dedicated track build with quick-release fluid solenoids to prevent clutch drag, or looking to swap out stock components with case-hardened race assemblies that hold severe torque loads on a built drag car or high-horsepower street machine, our professional-grade car audio and performance transmission hardware offers the line-pressure control and safety parameters you need at unbeatable prices. From raw solenoid wiring layouts to complete bolt-on modifications engineered for iconic automatic platforms like the Powerglide, TH400, C4, and modern electronic overdriven gearboxes, we carry the ultimate launch-control essentials. Don't see the specific shift pattern layout, solenoid amperage draw index, or specialized valve body parameter for your transmission rebuild? Hit the live chat or call 412-882-8346—we can special order and drop-ship exactly what you are looking for directly to your doorstep!