Hello,

Runnig a modified LT1 with a 3.07 rear end. At cruise speed (80KM/H) when I apply throttle, the car lugs and and doesn't want to get out the 1200 to 1400 range.

Im thinking the torque converter clutch is locked and making the engine work harder than it has too.

Is the idea to unlock the TCC sooner with less TPS or adjust the 4-3 downshift MPH. I am using LT1 edit.

If it is easier to send a file for me to look at, my email is.

89bowtie@sympatico.ca

I am not looking for a ready made tranny tune, just some help as to what needs to be adjusted.

Hope that is enough info,
Thanks,
Victor