ToyYodaCA

I spent some time testing as many variables as possible this last weekend and found that the vibration is weaker when the A/C is running. This difference was hard to notice while driving with road noise and bumps. I believe this means that the problem lies in the engine compartment and is likely related to the belt-driven components on the front of the block. I'll be checking those out in detail this weekend.

This may or may not be related to this issue, but the car wouldn't start this morning. I believe that I may need a new starter or the current one needs some TLC. Sigh...it's always something!

JLOWBOOTY02

I know this sounds crazy but check the running boards if they are equipped. My wife's on the driverside was a little loose and was causing hers. I replaced struts, strut mount, wheel bearing, tire, tie rods, and u joints. The tap was still present on the floor board. Finally figured out the running board was a little loose on the front tightened it up and it was gone.