TCi 376600 - User Manual

1
Part # TCI-9006
Revised 9/6/2016
Toll Free: 1.888.776.9824
www.tciauto.com
TCI
®
Automotive
151 Industrial Dr.
Ashland, MS 38603
Phone: 662.224.8972
TCI
®
376600
Universal TCC Lock-Up Kit for 700R4 and 2004R
This kit enables hands-free, automatic activation of the Torque Converter Clutch (TCC) along with the
option of manual control.
TCI
®
376600 Kit Contains:
Qty. Description
One (1) Internal Wiring Harness
One (1) External Wiring Harness
One (1) Vacuum Switch
One (1) Fourth Gear Pressure Switch - 2 terminal, N.O.
Two (2) Splice Connectors
One (1) #4 Machine Screw
Step 1 — Drain transmission oil pan. You will need a pan to catch fluid. Remove transmission oil pan
bolts. When removing bolts, remove so pan will not drop completely off. Instead it will be held in
place so that one side will allow the fluid to be drained. After the fluid has drained, remove the rest of
the bolts and pour out the remaining fluid. If your transmission did not come with a drain plug, you
may want to install a TCI
®
805800 universal drain plug kit into your pan now that you have the pan
off. Remember To Dispose Of Used Oil In An Environmentally Safe Way.
Step 2 — Remove original internal wiring
harness. Carefully disconnect the wire
connectors from the switches. Remove the wires
from the clips and unplug the wiring harness
from the connector near the detent roller spring.
Pry connector tab away from the plug and pull
the plug down. Do not pull on the wires.
Step 3 — Based on your application, find the
wiring diagram to determine the proper fourth
gear pressure switch location. See Figures 1, 2
and 3. Install the switch and torque to 8 foot-
pounds. Additional OEM switches may be left
in place even though they will not be utilized.
INSTRUCTIONS
Figure 1: 700R4 Street/Strip Wiring Diagram

Summary

Installation Instructions

Drain Transmission Oil Pan

Procedure for draining transmission oil, including advice on drain plugs and oil disposal.

Remove Original Internal Wiring Harness

Instructions for safely disconnecting and removing the existing internal wiring harness.

Install Fourth Gear Pressure Switch

Guidance on locating and torquing the new fourth gear pressure switch as per application.

Install TCI Wiring Harness and Solenoid

Details on connecting the TCI harness to the solenoid and transmission connectors.

Connect External Wiring Harness

Explains external harness connection, including ground, vacuum, and switch connections.

Manual Control Options

Describes three options for manually controlling TCC engagement using toggle switches.

Reinstall Transmission Pan

Instructions for reinstalling the transmission pan with a new gasket and refilling fluid.

Frequently Asked Questions

ECM Compatibility and Operation

Explains compatibility of the TCI kit with OEM computer and transmission control.

Identify Internal Wiring Harness Wires

Identifies wire locations on the TCI internal wiring harness connector.

Adapt Harness for 1993 700-R4 Connectors

Provides guidance on adapting the TCI harness for 1993 700-R4 models with non-matching connectors.

Handling Existing Pressure Switches

Advises on handling existing pressure switches on the valve body when installing the kit.

Optional Green Wire Functionality

Explains the function and optional use of the green wire for manual control.

One-Wire Solenoid Incompatibility

Details why a one-wire solenoid is incompatible with the TCI wiring setup.

Test Solenoid for Functionality

Outlines the process for testing solenoid resistance to determine if it is functional.

Troubleshoot Fuse Blowing Issues

Troubleshoots fuse blowing issues by checking for pinched wires or shorts in the system.

Diagnose Torque Converter Lock-Up Problems

Lists potential causes for TCC not locking up, including converter and pump issues.

Adjust Vacuum Switch Settings

Explains vacuum switch settings and how to adjust it for optimal TCC engagement.

Low Gear TCC Engagement

Clarifies that TCC engagement is limited to second gear and above by GM design.

Transmission Performance Issues

States that transmission performance issues are unrelated to the TCI wiring harness.

Limited Warranty

Product Warranty Coverage

Details TCI Automotive's commitment to repair/replace products for one year from purchase date.

Warranty Exclusions

Lists specific conditions and applications that are not covered by the limited warranty.

Implied Warranties and Damages Limitations

Clarifies limitations on implied warranties and responsibility for consequential damages.

TCi 376600 Specifications

General

Brand	TCi
Model	376600
Category	Industrial Equipment
Language	English