trans help

[devon lock]

I had my truck at the track today for the first time and the tranny had problems going in overdrive. If I hold it at full throttle it wont go in but if I let out of it for a second it will go in over drive. Any idea what this could be?

 

[mondtster]

OD on a torqueflite is completely electronically controlled. It sounds like you might need to adjust your TPS voltage a bit to get it to shift at WOT.