My friend and I installed a TransGo 4l60e hd2 kit in my camaro. He used to work at a transmission shop for a few years. Everything went smooth with the install and followed the instructions. Problem is when the car is in manual 1 the car wont really move almost like its on a transbrake. When in 2,D and OD it drives fine. I dont know what can cause it to do that? Any suggestions?