It'll be a while before I can get to it but I'm looking for opinions on a recurrent issue. Basically there's a shudder/knocking noise in 3rd gear, slow at low rpm and faster as you climb, smoothing out but not disappearing once you reach around 6000. As a precaution I've been avoiding using that gear when I can. My best guess is stripped or damaged gear on the actual gear or the counter shaft. Anyone had this issue before?