I picked up a 1941 Ford 1/2 ton pickup as a project. I've noticed a REALLY bad shake at 45-55 mph ONLY. All other speeds the truck is fine. After some research here in the Forum I started checking out the minor stuff on the truck. So far I've checked: Drive line angle. With a custom set of parallel rear leaf springs, 4" drop in the rear and an aftermarket transmission mount for an S10 T5 mounted to an 8-BA in a 1941 pickup, one of my first suspicions was the drive line angle was out. It turns out it's pretty good. The Operating angles of the transmission and differential are within 0.4 degrees. Only concern was the transmission, driveshaft and differential are right in line with each other. After some research it looks like this is acceptable. Front tire runout, side to side and radially. Both look fine. Loose nuts in the suspension. All fine. Worn front bearings. Both are fine. Then I checked for loose steering components. All of the steering components are fine, but when I moved the left front tire side to side I can feel a wobble, however I can't feel the same wobble in the right front tire. So, I had my daughter move the left front tire while I climbed under the truck. This is what I found (sorry for the flickering light, LED lights don't work well with video cameras): https://drive.google.com/file/d/1z2U11bvpAa1YuL3jUmHvOrYko7qctrcs/view?usp=sharing None of the steering components were moving when she was shaking the tire. Only the spindle moved relative to the front axle. I'm new to solid axle front suspensions, so I'm guessing a worn out king pin hole in the axle? I think the guy who restored the truck used the original front axle and suspension components. I imagine this is something I should fix, but is this bad enough to cause a shake in the truck to the point where you WOULDN'T want to drive it at that speed? Here are pics of the rest of the suspension: The reading I've done on the forum about eliminating death wobble is mostly about alignment and steering dampers. Which raises a question. What should the alignment specs be for this setup (dropped 4" in the front, I think) be? I plan to check the balance on the tires, which have been dynamically balanced on both sides, but figured I would have the alignment checked when I take it to the shop. Any recommendations are welcome. I can drive the truck, I just don't drive between 45-55 mph. Thanks!