what do i need to change to shut off all signals my ecm is expecting from my tcm? right now the message center says "trans hot...idle engine". i want that gone, and there are oother codes too, I'm assuming are related to the swap. Any input? thanks.
what do i need to change to shut off all signals my ecm is expecting from my tcm? right now the message center says "trans hot...idle engine". i want that gone, and there are oother codes too, I'm assuming are related to the swap. Any input? thanks.
You need to find an LB7 manual trans calibration to stop it from looking for the TCM.
1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that,
DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit.
For the trans hot light in the dash, I put a .4 ohm resistor between the trans temp sensor wires (a black and a yellow w/black stripe). I had to cut the Allison plug off down where it plugged into the trans. The resistor made the gauge show 150 degrees. Alternately you could ground out the wires and the gauge will show 0. You will have to see what size resistors work best.
I had tried using a manual tune, but we ran into issues with the cruise control. I am currently running a automatic OS. There is a torque limiting table in the TCM that will need adjusted so the ECM does not limit fuel.
Last edited by JasonW; August 29th, 2011 at 06:07 AM.