I have a generic maybe stupid question I am new to tuning . We have a upcoming project installing a 8.1 and Allison transmission into a 2000 1 ton dually chassis. With a 66 GMC cab.
I was looking at the 8.1 tune up with my mvpi2 yesterday and I noticed in the transmission section there is values in the transmission tables.

I'm not going to mess with any of them. My question is how does that work is that ECM sending values to the TCM that is on the Allison? Just curious