TCI 377550 Shift Boss Programmer for GM 4L60E and 4L80E transmissions.
The 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.
Designed for GM 4L60E & 4L80E street applications.
Performance transmission programmer includes three unique shift mode options – Stock, Stage 1 & Stage 2.
Monitors critical transmission functions & operating temperature.
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