What are the diffrences in a TH350 and a TH350C transmission? I have been told there is an electrical conection on the driver side but the one I have does not. It does have what looks to be a pressure switch on the passenger side. Can someone tell me what this is? Can a TH350C trans be used for performance. Or just rebuild stock. Is there a demand for them if I spend the money to rebuild to sell on Ebay or should I not waste my time?