Ok I can use some input from you pros if I may. I bought a SBC and a turbo 400 from a guy a few years ago. Well I ended up trading this motor and trans to a friend after it stayed in storage for a few years. Oh let me get this detail out, when I bought the motor and trans I saw the car run and drive before the guy pulled it out of his drag car. Now the friend that I did the trade with loans it out to some other guys that I don't care for nor do I trust one bit. These guys have a very shaddy past but nevertheless he loaned it to them not me. Anyway they install the trans in a car and nothing. So said when put it any gear it did nothing. This friend of mine takes the trans to another friend of a friend to have it checked out and they guy pulls the pan and the front pump. He said a clip in the linkage within the pan was missing and would not allow the trans to go into any gear. Well I now have the trans here in my garage and I pull the pan and the linkage looks good to me. And I cannot see what this guy was talking about as the linkage looks pretty simple to me with no clip to even go missing. So I look at the front pump which is loose just two bolts kinda holding it in place. I go and give the pressure valve a look at and you can tell someone had been pushing on it as it has some witness marks of metal on metal contact. I'm not too much alarmed about that as I can see that as a way to see it moves freely with no binding. Well I remove the C-clip and take out the pressure valve and there is a bit of scarring on the aluminum valve. I can take some pics of this if needed. My question is, would this be likely the problem? The fluid is very clean, doesn't smell burnt at all. As a matter of fact the fluid looks fresh as new and the inside of the trans looks real good. It is a mildly built th400 with transbrake and a reverse vb. I would appreciate any and all input with this little issue. As I stated in the beginning I do know this was a known good trans as I had the guy run the car and run it down the road in all gears and it all looked good. The guy assured me he took good care of his stuff and it all looked well maintained. Now the guys that borrowed the trans from my friend I don't trust one bit but I'm not the one that loaned it out to them. Anyway I hope this is something simple and can be resolved and appreciate any help.