Posted this in the allison section with no response, thought this might be a better forum . When I put the truck in drive it makes a nasty clunk and sets the ses light. Predator on 40 not flogging it. In fact hardly ever flog it. Predator got PO700TCM code up. Can you tell me what this is. Problem started real sudden. The only thing different recently is I had the radiator repaired. Is it possible some water got in the tranny cooler lines when pressure checking. I don't know. It has been working perfect until now. Thanks for any help. I'm scared to drive it until I find out whats causing this problem

The 700 code is a transmission control module request check engine light. Really need to know the codes in the trans computer.

Thanks cobra the only other thing that came up on the predator wasPO087 unknown fault if that does any good