I have a 5.3L with 4 speed auto transplanted into a 68 Chevelle that I have tuned. It runs and drives great. When you pull it into gear then let go of the brake with no throttle input the car will start moving and increasing speed even shifting. It seems TAC_PCT% is increasing but I cannot find what is driving it. When coming to a stop and stopping it takes a long time for the TAC_PCT% and RPM to reduce. Attached are engine and trans cals plus a logs.
Dennis_68_Chevelle_12614085_29June2018_Idle_0014.ctz
Dennis_68_Chevelle_24238856_TCM_12May2018_0002.ctz
Dennis_Idle_29June2018_0002.efi
Dennis_Idle_29June2018_0001.efi