I have a really bad shudder in my drivetrain. It comes on mid rev range and gets progressively worse through the rev range. It happens when I’m driving and also when the cars stationary and I rev with the clutch pedalto the floor which makes me think it’s not a clutch related issue but I am not 100% sure if having the clutch disengaged would eliminate a clutch problem, like it not aligned properly or maybe its a flywheel issue.

Prior to me inheriting the car from my father-in-law he had a new clutch plate installed but he never got to drive the car after the work was done. I don’t think the shudder was there before. He gave me a long list of things that needed doing to the car before he passed away and the shudder was not on the list, so I assume it wasn’t there before the work was done.

I have done some trouble shooting, having a new harmonic balancer fitted (I was sure this was the problem) but the shudder is still there. I have also removed the fan belt and it’s not a fan issue.