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What PCM to control 4l80e without LS engine at this time

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Old Mar 15, 2013 | 10:11 PM
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Default What PCM to control 4l80e without LS engine at this time

I have been searching all around for information on controlling the 4l80e and have found a few options. Read more below before suggesting TCI or PCS etc

Current setup - 1955 Chevy Pickup, Running 1969 427 BBC with TH400, would like to switch to 4l80e for OD. My future plan is to pull the 427 (to put in 1969 Camaro currently work in progress) and replace with LQ4 with L92 heads. (Not set in stone)

Questions:
Can a T42 control a 4l80e without an ECM? Can it be done by adding TPS and VSS? Can it be tuned with HP Tuners?

Can I control a 4l80e with a PCM without the engine? Thinking for the future, can I put a PCM in now to control tranny and then have it run the future engine?

FYI - I am an engineer, so I have the technical and electrical skills/knowledge, just don't have a ton of information/experience with LS engines. Mostly Big Block all mechanical
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Old Mar 15, 2013 | 11:17 PM
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This year old thread might point you in the right direction:
https://ls1tech.com/forums/conversio...ontroller.html
It mentions the T42, but I personally don't know it.

I seriously doubt a normal PCM could be made to control a trans without the engine. The trans software depends on numerous engine sensors, much more than just speed, rpm and throttle position.

If you are an electronics engineer, there is an open-source trans controller project with various "kits" available:
http://www.msgpio.com/manuals/mshift/index.html

BTW - Even if you have no interest in building your own trans controller, this site has 4L60E/4L80E information, especially electrical and wiring diagrams, that I have not seen anywhere else.

Last edited by mrvedit; Mar 15, 2013 at 11:26 PM.
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Old Mar 16, 2013 | 03:06 PM
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I was looking with the megashift idea, it is nice to have a site with information. I also read the thread from a year ago.

Anyone else have suggestions?
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Old Mar 16, 2013 | 04:54 PM
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Optishift / US Shift. Good price, great controller, amazing software.

I love mine... full functional standalone with logging capability. Very easy to use. Also has paddle shift functionality if you're into that kind of thing.
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Old Mar 19, 2013 | 03:58 PM
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What information is sent from the ecm to the T42 through the CAN?
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Old Mar 21, 2013 | 08:42 AM
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Does anyone know where I can find more info on GMLAN communication?
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