Keeping it straight. On the straight-a-way.

[Accelo]

I have lowered trailing arm truck with coils and an aftermarket posi.
I have a difficult time keeping my truck tracking straight when the tires are spinning. The oscillations get really bad and counter steering helps but there is no way to stop them unless you back out of the throttle. I would hate to be the guy that fails to negotiate the straightaway!

I have several theories and one is the stupid design of the aftermarket rear sway bar. I plan on disconnecting it to determine if it makes a difference or not.

Wondering if others have the same issue and if, and how, they have solved it"

I am including a fun link to a 1200 HP C10 that has none of these issues and over three times my horsepower. Different chassis dynamics of course but none the less the video is a hoot and I highly recommend it. This is the video that made me thing the "under power" handling of my truck is not normal.

https://www.youtube.com/watch?v=kIegHrKkoak&t=125s

Wondering out loud, what his tire cost is per year? I think he toasted a set just for the video.