I have a 94 s10 with a 4l60 e tranny. When I'm in drive it won't shift into second gear it's like I'm in neutral. I can manually shift it into second no problem and every other gear is fine. It will shift into second while in drive if I'm really light on the gas but not wide open throttle. I took it to a tranny shop and he plugged it into the computer and no codes came up. He took it for a drive and he's baffled. He told me he was going to research and call me back... No call. I thought it might be the tps, I changed it no luck. Any ideas??? I don't want to rebuild the tranny and that not be the problem. Any suggestions would be greatly appreciated. Thanks!!!