I just converted my fuel injection chevy van into a carburator type engine, everything was okay engine didn't idle very well but it moved up until i drove it the second time then the gears didn't want to go into gear. Seemed like the transmission broke but i only move the van and didn't really run it hard. It was having a hard time going into gear but it went eventually then not at all. I was told to check the transmission fluid which i did and in the pan the fluid was smudgy and the filter was filled with smudge. I bought new filter and oil and gasket and will try tommorrow. What do you think? I have spent too much hard times and money on this van please need advice from experts.