[1970pelle]

I finally made my appointment for the front end alignment. So I washed the year of garage dust and dirty hand prints off the truck. Set the toe so I wouldn't destroy my new tires, on the short trip to the shop.
I thought I need to test drive it after the drop. Glad I did, I have a very bad slow vibration. Once back in the driveway, peak underneath. The rear diff pinion angle is off, I know I should have checked this.
I picked up a set of 2 degree shims and 4 degree shims today. I broke out my Miller Inclinometer (I had to look how to spell this) A tool I bought many years ago that has paid for its self many times over. 4 degrees seams to be the fix, but we'll see tomorrow.
Back to my test drive the vibration would stop after 10 mph. I'll say my truck rides so smooth with this drop, I hit the normal road bumps here. And it performs perfect, I'm really surprised and pleased.

Ken