It has started recently when i get the RPMs over 3k the car will start to shake and shudder from the engine area. I have been recently driving a lot thru the mountains and it started after a couple weekends of me doing this. It happens the majority of the time when I am in fifth or sixth gear going thru the mountains or when I have to speed up rapidly going on the on-ramp to the freeways. Any ideas?
On an additional note I recently had the Clutch changed a couple months ago, so I don't believe that to be the problem.