Click on our menu buttons immediately below to find MegaSquirt® information quickly:


MegaShift™ Site Map

4L60e.htmlThis is the right side frame of the index page for the MegaShift™ web site. It lists many of the MShift™ code's features and functions.
4L60e_left.htmThis is the left side frame of the index page for the MegaShift™ web site. It lists several of the most useful links.
4L60E_MT.htmlThis is the help file for configuring and tuning with MShift™ V1.100 code.
4L60Ecode.htmlThis page has links to the V1.10 code, INI, and help files. It also has a link to the V1.100 Codewarrior project (as a ZIP file) to create your own custom code for private use.
4L60Estim.htmlThis page describes the obsolete V1 trans stimulator.
7segment.htmlThis page explains how to implement a 7-segment numerical LED/LCD gear display using the MShift™ code and a few bits of hardware.
adccalc.htmlThis page explains how to set up an ADC (analog to digital converter) input for the MShift™ code.
assembly.htmlThis page has the default build instructions for the MShift™/GPIO controller with a 4L60e transmission.
betacode.htmlThis page redirects to the web page for the latest beta code version
betacodeCPT.htmThis page is a place-holder to the MS-II™ code with the CAN pass-through enabled. It links to: www.megamanual.com/ms2/code.htm
betatune.htmlThis page redirects to the user guide web page for the latest beta code version
bit_bang.htmlThis page explains how bit-banging a port produces a PWM output, and describes how to set them up using MShift™ code.
control.htmlThis page describes how the shift solenoids are used to select the forward gears in the 4L60e.
cpt.htmlThis page explains how to set up the CAN pass-through for the MShift™ code on TunerStudio.
diff.htmlThis page explains the differences between MShift™ code on a GPIO board versus a microTCU controller.
drac.htmlThis page has information on using a General Motors digital ratio adapter controller (DRAC) to filter a VR VSS senor signal.
gpconnect.htmThis page provides serial communication troubleshooting tips for the GPIO board with MShift™ code.
mods.htmlThis page describes some common modification to strengthen the 4L60e transmission.
mshftbom.htmThis is the Digi-Key BOM (bill of materials) for building a GPIO board for use with the MShift™ code and a 4L60E transmission.
mshftstimbom.htmThis is the Digi-Key BOM for building a V2.00 Trans Stim for testing an assembled GPIO board with MShift™ code.
newtrans.htmlThis page tells users what information they will need to gather to run an 'undocumented' transmission with the MShift™/GPIO board.
operation.htmlThis page describes the internal operation of the 4L60e transmission.
portspins.htmlThis page describes the default assignments of the ports/pins and circuits in the code.
recirc.htmlThis page explains why recirculation diodes are needed on PWM'd outputs, and describes how to install them.
releasecode.htmlThis page redirects to the web page for the latest release code version
releasetune.htmlThis page redirects to the user guide for the latest release code version
shiftbom.htmBOM for an Alpha or Βeta GPIO board using MShift™ code and a GPIO board.
spareport.htmlThis page describes how the spare ports can be configured.
test.htmlThis page explains how to test the installation of an MShift™/GPIO board in your vehicle.
tuning.htmlThis page describes how to configure and tune the shifts of the MShift™ controller to suit your transmission, vehicle, and driving style.
V2code.htmlThis is the page to download the embedded code (as a .S19 file), INI for TunerStudio, and help file for V2.1xx code.
v2transtim.htmlThis page describes the V2.00 trans stimulator, used to test an assembled GPIO board with MShift™ code.
v2transtimbuild.htmlThese are the instructions for building a V2.00 Trans Stim.
V2tune.htmlThis is the help file for configuring and tuning with MShift™ V2.1xx code.
V4tune.htmlThis is the help file for configuring and tuning with MShift™ V4.0xx code.
V22tune.htmlThis is the help file for configuring and tuning with MShift™ V2.2xx code.
V41code.htmlThis is the page to download the embedded code (as a .S19 file), INI for TunerStudio, and help file for V4.1xx code.
V41tune.htmlThis is the help file for configuring and tuning with MShift™ V4.1xx code.
V5tune.htmlThis is the help file for configuring and tuning with MShift™ V5.xxx code.
V5code.htmlThis is the page to download the embedded code (as a .S19 file), INI for TunerStudio, and help file for V5.xxx code.
v200.htmlThis page describes the differences between the older V2.00 GPIO boards and the newer V2.10 GPIO boards.
voltlever.htmlThis page explains the theory and operation of using a variable voltage to indicate the manual shift lever position (as in a OEM Ford application) to the MShift™/GPIO controller.
voltshift.htmlThis page describes how to use a variable voltage signal as UP and DOWN shift signal to the MShift™/GPIO board.
vss.htmlThis page explains how to wire and configure the VSS (vehicle speed sensor) to get the best possible signal.
wiring.htmlThis page explains how to wire the MShift™/GPIO controller to the vehicle and transmission for a 4L60e installation.
sitemap.htmlThis page. (The page you are looking at right now.)
4L80E/4L80.html
4L80E/4L80e.html
These pages describe the implementation of the MShift™/GPIO controller for the GM 4L80e transmission. These documents due in large part to Dave Hjort - thanks Dave!
41te/41te_wiring.html
41te/41tebom.htm
41te/41tebuild.html
These draft pages describe the implementation of the MShift™/GPIO controller for the Chrysler 41te transmission.



MegaSquirt® and MicroSquirt® controllers are experimental devices intended for educational purposes.
MegaSquirt® and MicroSquirt® controllers are not for sale or use on pollution controlled vehicles. Check the laws that apply in your locality to determine if using a MegaSquirt® or MicroSquirt® controller is legal for your application.
© 2012, 2014 Bruce Bowling and Al Grippo. All rights reserved. MegaSquirt® and MicroSquirt® are registered trademarks. This document is solely for the support of MegaSquirt® boards from Bowling and Grippo.