Hi folks,

I have a 2003 RX that just started making a vibration from 15 to 25 mph. Feels like I’m going over a rumble strip on the shoulder. Once I’m past 25, it’s fine. Any ideas? Almost feels I’ll it’s under the front passenger side floorboard but can’t be positive.

thanks.

 

Could be the torque converter. When did you last change the transmission fluid? And with what?

 

Thought about that but don't think so. The transmission cooler was replaced 15,000 miles ago along with a few quarts bought at the dealer. The vehicle only has 117,000 miles. It will do the same thing if I put it in neutral and shut it off going down a hill. Starts about 15 MPH and goes away about 25 MPH.