I'm fairly positive pins are good I had them all out today. Port has power as well. I suppose I can dig deeper on grounds, I only replaced 3 today. As for carrier bearing, I had that replaced the same time as the U-joints. Should add that transmission fluid is clean and has the correct amount...
1997 c3500 5.7 - about 6 months ago a vibration would start between 50-55mph, immediately replaced u joints and had driveshaft balanced. After the vibration was still there at 50-55mph I also noticed it around 70mph. Lead me to believe it was the torque converter. Well two days ago lost...