I just recently installed my 4l60e and at the track it hits the rev limiter, i have to let go of the gas for it to shift into 3rd and than get on it again. the thing is that it does it on the street as well. when i tried on the stree it would jump on the rev limiter twice than it will shift into 3rd. could it be in the tune? or could it be that it just needs some fluid??