Manufacturer of stand-alone electronic transmission control systems for retrofitting modern transmissions into classic and high-performance vehicles.
US Shift is a specialized manufacturer of high-performance, stand-alone transmission control systems designed for automotive enthusiasts and custom builders. Their product line, featuring the Quick 10, Quick 6, Quick 4, and Quick 2 controllers, enables the integration of modern electronically controlled transmissions—such as the Ford 6R80, 10R80, and GM 4L60E—into vintage cars, hot rods, and racing vehicles. Known for their durability and precision, US Shift controllers include built-in diagnostic displays and advanced tuning capabilities to optimize shift points and firmness.
In addition to the core control units, US Shift provides essential installation components, including wiring harnesses and Throttle Position Sensor (TPS) adapters. These products facilitate seamless compatibility with both carbureted and EFI engines. With a focus on user-friendly technology and reliable performance, US Shift empowers drivers to modernize their vehicle's drivetrain while maintaining complete control over transmission behavior.
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You can reach US Shift customer service by phone at (864) 646-8920 during business hours (Monday-Friday 10 AM-6 PM EST) or via email at support@usshift.com.
Calibrating the Throttle Position Sensor (TPS) is critical because it tells the controller the engine's load. Failure to calibrate the TPS can result in incorrect line usage, low pressure, and potential damage to the transmission.
The 10R80 transmission requires 1/2-inch or -8 AN cooler lines and a correctly sized transmission cooler located in the direct air stream to ensure proper cooling. Restricting lines to smaller sizes can cause overheating.
The transmission fluid level must be checked when the fluid temperature is at least 175°F to ensure the thermostat has opened and the cooler circuit is full. Checking at lower temperatures can lead to underfilling and damage.
First, ensure no error messages are present and that the correct tune is loaded. drive with light throttle to let the controller learn. If issues persist, do not apply heavy throttle; instead, contact support or send a data log for analysis.