My car has a bad vibration above abt 4500-5000 rpm when driving. It doesnt do it sitting stll and reving just when driving. Ive only really noticed it under wot in 3rd gear and 4th. 1st an 2nd just spin too bad i guess. I notice that on my harmonic balancer the rubber boot its missing and torn off. Will this cause it to vibrate? Do i need to replace it amediatly ? I havent really checked my drive shaft or anything else. Should i go ahead and put innew joints when i do my clutch install since its gonna be out anyways