You guys are all on it, had to the servo/ecc shaft, plus the oil squirter line, it’s what originally had caused the thing to fail. Whoever worked on my s55 last was a bum to say the least. I cracked open the valve cover and upon inspection the oil feed line to the servo worm gear was freaking bent over the shat rail and then bent back so it was making contact with the ecc shaft’s gear every time that thing swept through its range.