70 MPH Shudder - Ford Powerstroke Diesel Forum
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post #1 of 1 Old 12-31-2009, 10:51 AM Thread Starter
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70 MPH Shudder

I have an 08 250 with a 6" Fab lift on it with 36x15.5x20 tires..Ever since I put the lift on my truck it would start to shudder at 70 to 75 MPh Bad..I did all the adjusting and even tried a different driveshaft to no avail..I went to have a tire fixed from a nail and when asked what pressure to put in the tire I said what I have been which was 45 to 50 ..My guy said that was really to low for my heavy truck so we put 65 and yes the shudder all but left..Difference between night and day..Where my Radar detector hanging on the windshield use to bounce up and down as I hit 70 MPH now is quite still..Made me fall in love with my truck all over again..Just wanted to share my experience should it might help anyone..Chas
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