7427 bnkm as standalone trans controller?

[jalatl]

Truck specs:
1995 GMC K2500
Vortec 5.7 from a 97 Yukon with TBI intake, currently finishing up installation of FiTech Go EFI system for engine management.
4L80e with 4.10 gears
All new sensors, all new sensor pigtail connectors
OE 7427 ecm to control trans (hopefully). I had swapped ecms at one point to see if that was my issue a few months ago but never could get it to control the transmission so I swapped it back to the original. The engine ran the same with either ecm installed.
All bolt on's are new (alt, starter, etc)
All new vacuum lines and several extra ground points, all clean and tight
New fuel pump running 14+ psi, will be changing to 60 psi pump for FiTech system with all new fuel lines and filter.

[lionelhutz]

The concern I would have is that if the 7747 harness and operation is that messed up that it not keep operating the transmission correctly.

The only variables typically used for transmission control on the ODBI stuff are %TPS, speed and rpm so I would think that is all you need to make it work. You can open your XDF and BIN and look through the transmission stuff and confirm this.

I'm not sure I fully understand your TPS comment, but you would first have to confirm the voltage and output signal on the FiTech TPS to see if you could parallel to it.

[CDeeZ]

I'll be following this as I have friends from who from time to time try to figure out how they might control an 80e swap in something without buying one of the aftermarket controllers.

That link David posted is one I have been reviewing for a while now. Another option is to control it with a 411 PCM as a standalone which is described here:
https://sites.google.com/site/sloppy...ans-controller

[buddrow]

If you're going to go thru the effort of using a 411 for the trans, sell the Fitech and just use the 411 for everything, fuel, spark, trans. I will ultimately be more reliable and less frustrating. Are you a member of the Fitech Owners fb group?

Bud

[CDeeZ]

I am going to use the 7427 to control mine. Even if I have to have two of them, one to run the engine and the other to run the trans.