68mph shake
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Joined: May 2011
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68mph shake
At 68 mph a shake starts and I think it originates from the rear end. I had the back two tires balanced and the problem still exists. This is a truck that was rolled up on the passengers side at one time. I bought it after the accident at 1/2 NADA value. 2003 F150 extended cab 4x4 103,800miles. Any ideas 
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Joined: Sep 2006
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Look for a problem with the brakes on one side.
Jack up the rear off the surface so the rear hangs free, block the front wheels and run the rear up in speed to see if the vibration comes in.
If yes, remove the wheels and run it up again to see if the vibration is still there.
If yes remove the drums or disc and do it again.
This eliminates or proves as you chase the problem.
It may even come down to the drive line.
Do it all safely and under control.
Good luck.
Jack up the rear off the surface so the rear hangs free, block the front wheels and run the rear up in speed to see if the vibration comes in.
If yes, remove the wheels and run it up again to see if the vibration is still there.
If yes remove the drums or disc and do it again.
This eliminates or proves as you chase the problem.
It may even come down to the drive line.
Do it all safely and under control.
Good luck.
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