So over the weekend went to the beach for a cleanup, and did some playing.
On the way home a couple times at low speeds (25mph or less) the truck developed a death wobble.
Once I got stopped, then accelerated slowly, I didn't have an issue.
Gunned it at a stoplight and had an issue, so pulled over to the shoulder and complete stop.
Slow accel and again no issue, and did 60mph on the way home.
Back on my road, gentle braking and under 30mph death wobble again, but stopped after slowing down to about 15mph.
Got the truck up on jackstands and pulled the front wheels.
(side note, I had my truck into Les Schwab months ago complaining about loose steering issues, and all they wanted to do was an alignment despite me insisting there is something loose. They had like 4 techs looking at it and that's all they could figure out)
so both sides ball joints seem tight, tie rod ends on passenger side seem tight. Pitman arm is only a few months old and seemed good (replaced it when I found it loose not long after the Les Schwab visit. Castle nut and shaft were spinning freely inside the drag link)
Idler arm (replaced 2 years/8k miles ago) seems to have about 1/4" play up and down. Will need to be replaced (will order a moog from a reputable source this time) and the LH thread tie rod end was definitely shot. Somehow it's the one steering component I just happen to have sitting on a shelf at home.
Will take it for a drive tomorrow and see if I can recreate the death wobble. Hopefully not, but it's a light day for work and the customer is a friend of my sister so if I show up a little late they won't mind