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Message: <blockquote data-quote="Scainjr" data-source="post: 2861" data-attributes="member: 386"><p>Alright I have a 2006 gmc sierra running 20x14 fuels on 35x13.50 fuel mud grippers, and I'm getting a bad vibration/shimmy at 45mph and 65+. I've had them balanced and there good, and I've had the truck aligned 3 times.  I have completely replaced the entire front end and the ujoints in the driveshafts, I have tried running these at every psi from 35 to 62 and I still get a vibration sometimes worse at lower psi. Any thoughts would be greatly appreciated?</p></blockquote><p></p>