GM Performance Transmissions

If you're looking for Chevrolet performance transmissions or a GM performance transmission, Gearstar builds custom, hand-built units designed for street, strip, towing, and performance applications.

The Gearstar GM performance transmissions are built to match the horsepower, torque, and rear gear ratio specs of engines. Depending on the application, our high-performance transmissions can support up to 1,200 horsepower and 1,000 lb-ft of torque using premium upgraded components.

Our performance transmission lineup includes: 

• 4L60-E series (4-speed)
• 4L80-E series (4-speed heavy-duty)
• 200R4/200-4R (4-speed overdrive)
• 700R4/4L60E (4-speed)
• 4L65E/4L70E (4-speed)

Before a transmission and torque converter leaves our facility, it is dyno tested for the equivalent of 100 miles to ensure it's in proper working condition.

Why Builders Choose Gearstar GM Transmissions

• Over 25 years of transmission-building experience
• Custom-built to your exact vehicle and engine combination
• Hand-built by one technician from start to finish
• Premium internal components and custom torque converters
• Dyno tested before shipping
• Custom dyno test videos included with every build

Get Your Custom GM Performance Transmission

Contact Gearstar today to build a GM performance transmission that fits your exact engine and vehicle. Whether you need a performance automatic transmission for street racing, towing, or a classic car swap, we'll take the guesswork out of your build.