When I am at like a Jack in the box Drive through, if i give it a little throttle to pull forward rpms go up then the truck grabs and leaps a little forward ??? just wondering why this might be? Truck shifts great everything else is normal, just got the tranny serviced!

low fluid

just had it serviced though you think they did not fill it up enough

Sounds like a good posibility

K I Will Check The Fluid Tomorrow Morning!!!