Today’s electronically-controlled overdrive transmissions can offer excellent fuel economy and performance, but factory transmission controllers often fall short of the mark when it comes to street/strip or retrofit use, let alone all-out racing applications. The revolutionary new TCI® Transmission Control Unit elevates electronically controlled automatic transmissions to a new standard of performance and tunability.

The TCI® Transmission Control Unit is fully-programmable, and can be run as a standalone unit –even with a non-computer controlled engine, or in conjunction with OEM or aftermarket engine computers such as the FAST™ XFI™ system. The TCI® Transmission Control Unit will work with most GM, Ford, and Chrysler electronically-controlled automatic transmissions*, and includes a wide array of tuning options including load, gear, rpm and speed-based programming –all of which can be adjusted by simply connecting the unit to any Windows® based pc or laptop***.

Its ability to communicate with the FAST™ XFI™ fuel injection system and other compatible CAN 2.0b devices means that the TCI® Transmission Control Unit uses a simpler, easier to install wiring harness than most other aftermarket transmission controllers. The TCI® Transmission Control Unit includes easy to use T-Com™ software, which allows simple plug and play transmission operation via several built-in programs, as well as custom tuning and programming, data logging, and fault diagnosis. A multitude of digital inputs and outputs, analog inputs, and speed inputs and outputs allows the TCI® Transmission Control Unit to be custom tweaked to fit any requirement, such as steering wheel-based button shifting in a drag race application, or manifold pressure-based shift firmness in a turbocharged application.

Download T-Com™ 2.0.1 software (instructions included).

TCU Quick Installation Guide

NOTE: If you have the TCI® TCU™ #37000 you must use T-COM WP™ software -T-COM Version 2.0.1 will not work.  How to tell the two units apart

TCU SYSTEMS INCLUDE: Transmission Control Unit in shock-resistant and waterproof case     T-Com™ WP PC software, instructions and 5 ft. communication cable for TCU to laptop

Description	Part #
Transmission Control Unit (TCU)	377500

TCU Wiring Harness
TCI® Transmission Wiring Harnesses are fully pre-assembled and tested, making it easy to install even the most advanced computer-controlled transmission. TCU wiring harnesses feature all OEM-style connectors, high temperature oil resistant wiring and puncture-resistant outer sheathing for years of dependable service.

All connections are butt connected, crimped, and soldered for maximum mechanical and electrical integrity. These superb-quality harnesses feature clearly labeled connections, making them simple to install and vastly superior to trying to adapt a confusing, unlabeled factory harness to your new transmission controller.

Description	Part #
Transmission Control Unit (TCU) Wiring Harness - GM / Chevrolet 4L60E, 4L65E, 4L70E, 4L80E, 4L85E	377502
Transmission Control Unit (TCU) Wiring Harness - GM / Chevrolet 4T65/80E	377503
Transmission Control Unit (TCU) Wiring Harness - Chrysler 45RFE/545RFE	377505
Transmission Control Unit (TCU) Wiring Harness - Ford AODE/4R70W 92"-97"	377506
Transmission Control Unit (TCU) Wiring Harness - Ford AODE/4R70W 98" & up	377507
Transmission Control Unit (TCU) Wiring Harness - Ford E4OD 89"-94"	377508

 TCU Distributor Adapter Harness
Adapts the distributor connector into a GM vehicle's existing wiring harness.  

Description	Part #
Distributor Adapter Harness	377100

TCU Throttle Position Sensor Adapter Harness
Allows the TCU main harness to be pigtailed into an existing TPS while still functioning with the engine control module. This is a plug-and-play solution for splitting the TPS signal.

Description	Part #
TPS Adapter Harness for 2nd generation-style TPS	377200
TPS Adapter Harness for 1st generation-style TPS most commonly found on earlier computer-controlled carburetors	377201

Speedometer Control Unit (SCU)
The perfect solution to retrofitting an electronic transmission, this economical adapter pigtails into the electronic speedometer harness and has a connection to drive a cable-driven speedometer. Fully configurable for any tire size and rear gear ratio! Cables sold separately due to OEM variations.

Description	Part #
Speedometer Control Unit (SCU)	377300
Cable, 5/8" threaded ends, fits most pre-1976 domestic vehicles	377301
Cable, GM clip-on style, fits most 1976 and later GM vehicles	377302

Remote TPS and Mount
GM type sensor mounted on base with cable actuation. Fully adjustable and works well with carburetor applications.

Description	Part #
Remote TPS and Mount	377400

TV Cable Bracket

Description	Part No.
700R4 & 2004R Carter® AFBT, QuadrajetT, Edelbrock®	376700
700R4 & 2004R Holley® carburetor	376705