Precision Turbo and Engine BigStuff3 GEN3 Powertrain Controller Transmission Control Users Manual - Manual (Page 4)

Bigstuff3 GEN3 Transmission Control Manual
The header connector
will be marked
“Transmission” to
indicate where to connect
the transmission harness
to.
System Installation Overview
The BigStuff3 transmission control wire harness was designed to connect directly to the stock GM
input and output shaft speed sensors and the stock 20-pin header connector on the transmission.
The steps required to configure the GEN3’s transmission control feature are described in detail in this
manual. A brief overview of the installation and configuration process is described below.
• Step 1 - Install the BigStuff3 Transmission Wire Harness - Install the transmission wire
harness between the GEN3 ECU and the transmission. The wire harness installation process is
very straightforward. There are a total of 5 connections that need to be made, as outline below:
o Two (2) connections to the Transmission Input (TISS) and Output (TOSS) Sensors.
These connections are made directly with the stock sensors on the transmission.
ƒ Note: 4L60E transmissions only have a TOSS sensor.
o One (1) connection to the stock 20-pin connector on the transmission.
o The transmission wire harness header connector to the GEN3 ECU header connector
marked “Transmission”.
o The +12v Switched wire connection.
• Step 2 - Configure the ECU for the transmission being used.
• Step 3 - Configure the Operating Tables – Specifically, the Shift, Torque Converter Clutch
(TCC) and Line Pressure (LP) tables.
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