grinding

So my journey has been long. I love my car but it has been more "challenging" than I could have imagined. Sorry. So I knew there was something a little messed with the car when I bought it but figured if anything, I would get it fixed and have the trim package and color I wanted without it...

have a 2009 Challenger SRT8 and even after I put the skip shift Eliminator on it's still grinds a bit going from first to second no matter how easy I am on it, does seem to go away a bit once it gets warmed up better but never fully. Does anybody know a method to make it fully go away.