sporadic shifting, losing overdrive

MrClean

ADDICTED
Greg,
I have an 04 lightning with one of your VB's and a 4x4 pan a dyno tune, 4# pulley, accufab TB and an intake
My problem is after the truck was parked for a week I took it out and it's shifting sporadically ie hard shifts high rpm's. If I try to shift manually it doesn't shift at all I have shut it off and restart. It also falls out of overdrive around 70mph sometimes 65 mph. I was going from Chattanooga to Nashville when I was getting on the interstate, i went WOT after that I didn't have the problem until I did it again. Now it's back to sporadic shifts.
Can you give me any ideas of what would be the cause?

Thanks
Vince
 
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