Well this is my first post so here gos.. I have a 94 f150 4x4 with a 351w matched with a E4od trans.. Recently it developed a shudder in 3rd and overdrive.. The odd thing is it only shudders when the torque converter is trying to lock up.. But it will lock up and it wont shudder if its not under any load.. I pulled the codes and 628 code and the fluid is a nice red and not burnt.. Just need some input. Is this a common problem with the e4od?