Hello everyone. I'm going to explain this as best as I can. First, talking about 07 F250 SD Crew Cab Long Bed 4X4 with 6.0. Bulletproofed, leveling springs, 5k firestone airbags, upgraded brakes, new front driveshaft and new universals and carrier bearing on rear u joint.
The issue: When accelerating from a stop or a slow rolling start, turning right or left, I get a shimmy (vibration) that seems to be coming from under my feet. Not a violent shimmy, but enough to make me certain that something is loose or out of alignment in the drivetrain. IT IS NOT THE REAR END as friends have constantly told me. Rear end was serviced and cluth packs lubricated with no change in issue.
What I've done: Changed transfer case fluid, new front driveshaft, new u joints and carrier bearing on rear driveshaft. There has been no improvement after these repairs, if anything the vibration is a little worse and easier to induce.
HELP, I'v been chasing this problem for over a year. Going to be pulling a Toy Hauler out west this falls and really need to repair this for my piece of mind..