TC slipping? Video Inside
 

These videos are located on another thread as well. Seeing as this thread poses a question to a different mechanical problem, I am hoping I can get some different responses from you transmission guys on here.

Truck has the following modifications: #0 plate, 3k gsk, 4 clicks, 35psi boost elbow.
Truck was previously suffering from power loss
New: LP, afc reference hose, overflow valve, retimed to stock, valves adjusted, boost pressure tested, and fp tested. Has trouble towing, and at WOT as seen by the videos. Vibrates in gear at stop.

- WOT 0-60 Empty

- towing empty 16ft flatbed half throttle