Man does this tune from Truck Source Diesel run hard. Shifts are perfect and aggressive. Nice and firm. Torque converter lockup is perfect and he has it locking up in in 3rd. It locks in third at a certain throttle position and other than that it drives like stock in normal driving conditions. Power is another story. By far the most powerful tune I have ran. It is more powerful than my SRL and my RCD race tune. I also have a aggressive street tune from Innovative. I know that it is not a race tune but my TSD tune has a lot more power. Tune runs pretty cool too. EGT's only get to about 1300 degrees which I think is pretty cool and then they drop off from there. 700 degrees with cruise on going 70. Boosts 30-31 on hard accel and boosts at 34-35 on a hard pull in OD to 90mph. Chris is an awesome fellow to deal with also.