Thats the one...Basically set the high speed to Zero % and lower the MPH to your liking. I have mine set to 20 mph and have my TCC tables setup to keep it locked 2-4 in Tow/Haul. Works great for engine braking with a loaded trailer.

 

I wonder since you are on all motor with 80e. I have same stall as your but I'm forged 347 motor with 10:4.1 cr still won't spin tires.vegeanxe racing already tuned my PCM. Wonder why can't spin tires. Maybe turbo will help to spin tires? I wonder if you have same issues. Can you send me video from 0-60 mph accleration see if it's same as mine. Thanks.

 

Once I removed TM, I can definitely spin the tires. If I floor it from a stop, it will spin a bit (stock motor). And if I put it in 1st and stall it up, it will start spinning both tires at about 2800rpm. Before I removed TM, I could not spin the tires to save the truck's life. After removing TM, the truck feels perfectly normal for having a wheezy bone stock LM7, 3.42 gears, and a ~3000 stall. The stall definitely woke the truck up and made it more fun, but before I removed torque management, it actually felt worse.

 

My old Express van with the 5.7 L31 with Etec 170 heads, 215/220 cam, marine intake and Tri-Y headers can spin the tires if I jump on it hard from a stop and if I powerbrake it turn the tires into a smoke cloud. Stock 4L80E converter and 3.73s. It also got a bit more weight over the back tires than a truck too.