Oscillation began within the last 1000 mi. Now have 26000. When hitting bump in road, shimmy begins above 50 mph and have to brake / decrease speed and pull off road, it's getting worse. I have had it in twice and unable to find anything with suspension. Good rubber/wear on tires.( no cupping , even wear, no flat spots ) I have followed scheduled maintenance with proper tire pressures and rotations.

I have researched web and can't find any recalls on this year F350. Apparently common in older model f350s. Any ideas? I am afraid to drive it.

Thank you gentlemen and Merry Christmas to your staff!