Cyclical vibrations felt in gas pedal and heard at 2000 RPMs started around 100K

Title pretty much says it all. As I get towards 2000 RPM I can hear and feel a cyclical vibration. I feel it in the gas pedal, and everywhere. It's not too troubling. Some suggested that it could be spark plugs, which are due for service, however I have a hard time believing that it would run smooth as can be at lower RPM. I was thinking fuel injection but ran some injection cleaner though it with no improvement.

Would anyone care to guess what it could be?

 

u-joints???

 

Seems more engine related.

 

Same in all gears at 2000rpm?

 

Hmmm. Will get back to you on this tomorrow. Good thinking.

 

Did some playing around with it. I get the vibration when in neutral and going 60 mph. It sort of feels like driving on the rumble strips on a highway. Bearing? Something is wrong. Definitely not engine related or transmission. Any ideas?

 

did anyone ever follow up on this problem or figure it out because im having almost the exact same issue at barely over 100k miles???? Vibration comes and goes and gets worse when the cluth is about halfway engaged and my gear shift has started to wobble pretty bad at about 5mph when braking to stop