TCI Shift Boss Transmission Programmer

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For performance GM 4L60E and 4L80E applications, the TCI Shift Boss is designed to ensure the desired shift firmness while monitoring important drivetrain functions, including line pressure and temperature. Featuring three shift mode choices - Stock, Stage 1 and Stage 2, the Shift Boss lets you know of any warning signs of potential problems, (e.g., when the transmission temperature is too high). Simple-to-use and easy-to-install, this programmer can be considered inexpensive insurance to monitor and diagnose transmission problems.