I just bought this vehicle, and it never did this when I test drove it. While I was driving it made this metal screeching noise, and second or two later the noise went away and the rear of the vehicle vibrated for second or 2, and went away. When i accelerated it happened again. Luckily my house was right around the corner. I thought it would be the difference in tread. I grabbed a penny and tread on front and rear are dime thickness (or whatever the us 10 cent is called) apart.

Even if there is a small tread thickness could that still cause it?

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    Did you check to see if the parking brake was on? – Pᴀᴜʟsᴛᴇʀ2 Mar 6 '16 at 19:30
  • Emergency brake isnt on. If that is what you mean. – andyADD Mar 6 '16 at 21:04
  • More likely something with the brakes, not sure if the are disk or drum on that, but could be a rock in there or no pad material left... – Digital Lightcraft Mar 7 '16 at 13:26
  • New brakes, and master cylinder were installed recently. I guess rock could've got in there when they were putting drum back on. – andyADD Mar 8 '16 at 5:27
  • The rock theory is possible. Have you had a re-occurrence of this issue since you asked the question? – DucatiKiller Apr 5 '16 at 2:16

Pull the drums and check to see if any of the springs inside let go. Had that happen on a Ford pickup once.

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