DW has a bunch of potential sources, and has been extensively covered prior to this posting. One source I've not seen discussed nearly as much is having axles parallel to one another.
This is my experience I just had yesterday.
Started getting death wobble at the usual 40'ish mph. I could accelerate past it and be fine. Then I noticed something new. At 60'ish or so if I turned slightly to the left (like to change lanes on the freeway) DW started up. Nothing like that happened when I turned to the right.
I checked all the usual suspects, everything seemed fine.
Then I remembered I had played with trying to reset the caster (was at 5 deg and wanted higher). During that process, which I was doing completely wrong by the way, I discovered I had the passenger side front axle 5/8" further forward, causing the axles to be non-parallel. I also remembered that while driving there was a need to turn the steering wheel just a bit to the right, against a slight tendency to pull to the left.
I discovered my error in moving the passenger end of the front axle forward, reset the axle parallel, and reset the caster (doing it correctly!) to 8.5'ish and it drives nicely now
Lesson learned - axles not being parallel should be something checked when correcting DW.
This is my experience I just had yesterday.
Started getting death wobble at the usual 40'ish mph. I could accelerate past it and be fine. Then I noticed something new. At 60'ish or so if I turned slightly to the left (like to change lanes on the freeway) DW started up. Nothing like that happened when I turned to the right.
I checked all the usual suspects, everything seemed fine.
Then I remembered I had played with trying to reset the caster (was at 5 deg and wanted higher). During that process, which I was doing completely wrong by the way, I discovered I had the passenger side front axle 5/8" further forward, causing the axles to be non-parallel. I also remembered that while driving there was a need to turn the steering wheel just a bit to the right, against a slight tendency to pull to the left.
I discovered my error in moving the passenger end of the front axle forward, reset the axle parallel, and reset the caster (doing it correctly!) to 8.5'ish and it drives nicely now
Lesson learned - axles not being parallel should be something checked when correcting DW.