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TCI377550 - TCI Shift Boss Transmission Programmer w/o Pressure Sensor

This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.

Availability: Item has been discontinued and is no longer available


TCI Shift Boss Transmission Programmer without pressure sensor
For use with GM 4L60E/4L65E/4L70E/4L80E/4L85E

All too often, performance street enthusiasts place emphasis on potential engine problems while critical transmission functions go unnoticed. Available for performance GM 4L60E/4L65E/4L70E/4L80E/4L85E applications, the new Shift Boss Transmission Programmer from TCI® is designed to ensure desired shift firmness while also monitoring the two most critical drivetrain functions - temperature and transmission line pressure (additional sensor required).

The Shift Boss features three unique shift mode choices - Stock for OEM shift characteristics, Stage 1 for firm solid shifts and Stage 2 for hard strip shifts. You can monitor transmission temperature or pressure (additional sensor required) by simply depressing the display button. Simple-to-use and easy-to-install, this performance programmer can be considered an inexpensive, easy-to-install shift improver, and temperature/pressure monitor for your transmission.

This handheld unit includes a digital screen with selection options for transmission temperature, shift psi (additional sensor required) and all three shift modes.

Application List



  • 377550
  • 377550
  • TCI Transmission
  • Item has been discontinued and is no longer available
  • New


Shipping Information

  • Item Requires Shipping
  • 11.2 lbs.

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