Hi, I Allen and thanks for adding me. I have always been a Ford man until I traded for my 2000 Chevy Silverado 4x4. I really like this truck but recently from a stop sign I started to cross and shifting into 2 nd it felt like a Semi hit me from the back( no other vehicles around) but the truck just started slowing down. I tried again 1 was good shifted into 2 and slowed down like brakes were applied. Had new trans put in and same thing going on. Shop is scratching there head not knowing what to do. Can someone help please.