If you’re in the market for Chevrolet performance transmissions or a GM high performance transmission, you’re in the right place.
We are dedicated to engineering and building the finest Chevy and GM high performance transmissions in the world. Our custom, hand-built high performance transmissions can handle up to 1200 horsepower, 1000 ft-lbs of torque, and are built with the highest quality parts available.
Our GM high performance transmissions are built to the horsepower, torque, and rear gear ratio specs of the engine that it will be matched to.
Unlike other high performance transmissions builders, each individual transmission is built by one technician from start to finish.
Before a transmission and torque converter leaves our facility, it is dyno tested for the equivalent of 100 miles to ensure that it is in proper working condition.
The Turbo 350, affectionately known as the TH350, stands as a testament to durability and performance.
Introduced in the late 1960s, this three-speed automatic transmission quickly became a favorite among enthusiasts for its compact design and robust construction. Ideal for street rods and muscle cars, the TH350 offers crisp shifts and can handle substantial horsepower and torque when properly built.
At Gearstar, our Level 2, 3, and 4 TH350 transmissions are tailored to support varying performance demands, ensuring that whether you’re cruising the boulevard or tearing up the track, your transmission delivers unwavering reliability.
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Stepping up in strength and capability, the Turbo 400, or TH400, is renowned for its resilience under pressure.
This three-speed automatic transmission has been the backbone of many high-performance and heavy-duty applications since its inception. Its ability to manage higher torque loads makes it a preferred choice for drag racing and off-road ventures.
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For those seeking the benefits of overdrive without compromising on performance, the 700R4 emerges as a compelling option.
This four-speed automatic transmission not only enhances fuel efficiency during highway cruising but also provides robust first and second gears for spirited acceleration. It’s a versatile choice, fitting seamlessly into both classic restorations and modern performance builds.
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The 200-4R is a hidden gem among GM transmissions, offering a favorable gear ratio spread and compatibility with a wide range of vehicles.
Its overdrive capability makes it a popular choice for those looking to combine performance with practicality. Whether you’re aiming for improved fuel economy or enhanced drivability, the 200-4R delivers.
Gearstar’s custom-built versions are designed to handle increased power outputs, ensuring that performance enthusiasts don’t have to compromise on strength or reliability.
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As electronic controls became more prevalent, the 4L60E emerged as a successor to the 700R4, integrating electronic shift control for improved precision and adaptability.
This four-speed automatic transmission is widely used across various GM platforms, offering a balance of performance and efficiency.
At Gearstar, we recognize the potential of the 4L60E and offer enhanced versions that can manage significantly higher horsepower and torque, tailored to the unique demands of your vehicle.
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Building upon the foundation of the 4L60E, the 4L65E introduces strengthened components to handle greater power.
It’s an excellent choice for those who have augmented their engine’s performance and require a transmission that can keep pace.
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The 4L70E represents an evolution in GM’s transmission lineup, offering enhanced durability and performance features over its predecessors.
It’s designed to accommodate higher torque capacities, making it suitable for performance applications that demand reliability.
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For those seeking a transmission capable of handling extreme power, the 4L80E stands out.
Often likened to a modernized TH400 with overdrive, this four-speed automatic transmission is engineered for heavy-duty performance. It’s a popular choice for high-horsepower builds and towing applications.
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At the pinnacle of GM’s transmission offerings lies the 4L85E, a unit designed for the most demanding applications.
With its robust construction, it effortlessly manages extreme torque levels, making it ideal for off-road racing, drag racing, or custom street driving.
Gearstar’s custom-built 4L85E transmissions are tailored to your exact specifications, ensuring that they deliver unparalleled performance and durability, regardless of the challenges you throw their way.
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The 6L80 is a modern six-speed automatic transmission designed for power, efficiency, and adaptability.
Found in various GM performance and heavy-duty vehicles, it offers smooth shifting, enhanced fuel economy, and the ability to handle substantial torque loads.
With its advanced electronic controls and robust internals, the 6L80 is an excellent choice for street performance, towing, and off-road applications.
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The 6L90 is a beefed-up version of the 6L80, designed to handle even greater torque and horsepower.
Built for high-performance GM vehicles and heavy-duty applications, this six-speed automatic transmission features reinforced internals and a higher gear ratio spread for improved power delivery.
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The Powerglide is a legendary two-speed automatic transmission known for its simplicity, strength, and efficiency.
Originally introduced by GM in the 1950s, it has become a staple in drag racing and high-performance applications due to its lightweight design and ability to handle extreme horsepower.
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Gearstar offers a range of high-performance transmission components designed to enhance the performance of GM transmissions.
These components include gear sets, clutch packs, and bearings, all engineered to provide improved performance, reliability, and durability.
Designed to work in conjunction with Chevrolet Performance crate engines, these components provide a complete high-performance solution.
Regular maintenance is essential to ensure the longevity and performance of GM transmissions.
Gearstar offers a range of transmission maintenance and support services, including transmission fluid changes and filter replacements.
GM and Chevrolet Performance customers can rely on a team of experienced engineers and technicians who provide expert support and service for all transmission-related issues.
If you need a high-performance transmission replacement but are unsure which one is right for your vehicle, Gearstar’s team of experts can help.
Regardless of what type of transmission you’re looking for, Gearstar offers a range of GM high performance transmission options.
Each unit is custom-built to meet your specific needs, ensuring top performance and reliability.
To get started, simply contact Gearstar for an estimate. Our specialists will gather information about your vehicle, including its horsepower, torque, rear gear ratio, and intended use.
Whether you need a transmission for street performance, drag racing, towing, or off-road applications, our team will match you with the ideal transmission for your setup. Even if you’re unsure which transmission is best, our in-depth expertise ensures you’ll receive a recommendation tailored to your vehicle’s demands.
Each transmission is crafted by a single master technician and undergoes rigorous dyno testing before leaving the shop. This meticulous process guarantees that every unit meets the highest performance standards. Plus, Gearstar’s 3-year/36,000-mile warranty provides peace of mind with your investment.
No matter your level of experience with transmissions, Gearstar makes it easy to find the perfect replacement.
Reach out today to discuss your options and receive a customized estimate for a high-performance transmission built to exceed expectations. You can also check out our customer testimonial page to read what past and or current high performance transmissions have to say about us at Gearstar.
