I have a 99 silverado with a 4l80e and a 3400 converter. All of a sudden i have no lockup. The converter isnt even a year old with 5k miles on it max. Under normal driving conditions After the shift into 4th gear at about 46 mph i can feel what seems like the converter locking up but more throttle reveals its not locked. I have attached a short log and my tune file. Could you guys tell me if something is off in my tune or if my lockup clutch is possibly toast? Thanks