Sometimes when lifting a truck you end up screwing up the pinion angle. When I installed my OME leaf springs, I had no vibrations at all. My problem arose when I installed my BudBuilt crossmember. They are listed as no drivetrain lift but they do, in fact, lift the drivetrain just a little. There are no clearance issues with stock trans and body heights but it does throw off the pinion angle. Regardless of the cause, this video I made shows how to measure the pinion angle and what is necessary to solve it. Keep in mind, worn u-joints, unbalanced tires, and a number of other things can cause vibrations. In any case, I hope this video helps you out. I also have step by step videos showing the OME spring install, the BudBuilt crossmember install, and many other Pickup/4Runner 22RE how to videos.

 

nice work, I think that you covered all of the major points.