I was sitting in stop and go traffic today and notice that if I touch the gas or let off the gas there was a "klunk" from the rear of the car, so I put it on the lift when I got back to work and talked to some other people in the shop and we came to the conclusion the I need a new unversal joint (Spider kit as Toyota calls it). Well on the way home there was a vibration at about >60 mph, could the fact the I need a new univeral joint (Spider kit)be causing this vibration? I am going to recheck the balance of the tires tomorrow, but I don't think that is the issue because the tires were just mounted and balanced by myself no more than about 3 weeks ago. If there are any other things that I should be looking at or if I am headed in the right directions please let me know. Any info or input is greatly appreciated!!