I have a 2006 3500 SRW, I had the trans rebuilt- Red Eagle Kit, Rigid Bands, HD Strut and anchor, All billet servos, 4.4 apply lever, Mag Hytec deep pan, Rev Max Single disc, Transgo shift kit. Issue im having is that if you are just creeping in a parking lot or going slow, it down shifts hard and make a loud clunk that is very noticeable, also upshift it does the same. It sounds like s breaking. Shop says its fine the shift kit does it. The fist time it happened I thought it fell out of the truck. If it is normal how do I get it to stop? Will it hurt anything? Im about to buy a Chevy and really don't want that!