That's the TC locking up at 35mph.Not OD.

 

Thanks, edited my post.

 

thank you dsertdog56 for your thread. I contacted Sean at hemifever and he set up a programmer with three tunes for me. I went with an 87 and 89 octane tunes for performance and an 89 for towing. Immediately after programming my truck on the 87 setting it felt like the engine had been replaced. Not only was the low end much improved my fuel mileage shot up 1.5 mpg. Currently I have my truck set on the 89 octane setting and I can break the rear tires loose from a dead stop barely getting into the throttle.

 

Glad to see. I checked mileage tonight and I'm at 11 mpg city. Again, not much of a gain but I need to check some other variables.
For instance I noticed my gas cap was leaking fumes. This means gas is evaporating into the atomosphere, not circulating in the evap system to be burned.