can anyone tell me whats wrong with my car?
97 gsr

i was getting on the highway and i was going from 3rd to 4th gear and went to second gear instead, as soon as i felt the rpms jump i corrected my shift.. ever since i get vibration in my shifter when im over like 4000rpms and when i rest my foot on the clutch i can feel vibration in the clutch... i took it to my mechanic and he could not pin point the problem but said nothing is wrong with the motor (whew). he said his best guess is the clutch or just from my exhaust vibrating the car. (but not sure because he didnt actually take the clutch out). i really doubt its my exhaust causing this. has anyone had this problem or have a suggestion of what might be wrong? any response would be greatly appreciated.