Bangs into reverse and drive harder than it did. Now truck only takes off in drive no 1st or 2nd gear. Any ideas? Thanks.

 

kaboom, you toasted the bands between reverse and 1st and 2nd, they all work of the same band. or you tranny control module went. try reseting the computer by removing the negative battery cable for about 20 minutes, to see if it will reset. if not, off to the dealership