vibration at 65-70 mph

saramoore673

New Member
I have an 03tl S. I get a little vibration on the highway at 60-70 mph, but I can't figure out if its from the engine, suspension or wheel/tires. It's worse in 5th gear and diminishes when I shift to 4th. It almost feels like the engine is lugging. Just to make sure I had all tires balanced, etc. The O2 sensor is a though, too. Anybody with some ideas?
 


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