Hi All: hoping to get some anwers or what I should do. I just purchased this vehicle about a month ago. It does have hi mileage (225,000). So far I have had to put $1200 dollars in repairs. anyway I have a vibration or more like a rumbling sound in it. It only happens between 45 and 65 MPH while I am accelerationg. If I let up on the gas it stops completely. When it is cold it does not do it at all until I have driven a few miles then it will start again. This has me baffled. I thought maybe the tires but it goes away when I let up on the gas. Any suggestions out there? Thanks for reading!