HERE IT IS http://www.peachparts.com/shopforum/diesel-discussion/333601-torque-converter-transmission-problem-82-300d.html

Sorry, I forgot to post the final outcome
 

I looked back and found that I didn't post the final outcome. It was in fact a bad valve body. I pulled it and sent it to Marc, and he provided a rebuilt one. I put it in and the trans goes into gear, and shifts perfectly. Yes this was over 5 months ago, and I am sorry for letting everyone hang for that long.....Rich

How was the valve body bad ,just curious ,loss of forward gears with reverse still functioning is a common trannie issue it seems ROLLGUY .The question of the b2 piston being the issue usually rises to the top . The expert transmission guys only find the issue after taking it dwn then inspecting it further . Heartache comes when we find out we cant fix it as a diy and part of that hurt is in the pocketbook.Is the valvebody another reality to the symptoms .I have talked to an expert across the issue and he says once the pan is dwn he can tell if the b2 piston is the issue , and he has owned one or two.Ill reckECK this as it might need to be the final say so for b2 piston removal ,take some clear pictures of the spot to look at my trans with this current issue, post with pics to this thread hopefully in Jan .when I can spend time on this one car.

I wouldn't have believed it if I didn't experience it first hand. After getting the trans back from the shop, installing it, and it having the exact same issue was very discouraging. I thought afterward that surely if the VB was suspect, they would have replaced it when it was at the shop. Evidently, they were as much surprised as I was that the VB was bad. Although it was a lot of discouraging work, the final outcome was a big relief.....Rich

Perhaps this video may capture the b2 piston and itshttps://www.youtube.com/watch?v=LIr99-2IpFs connection to its band .