SSickLS1SS

getting a vibration after installing a new 8.8 rear. i upgraded to a PST driveshaft and a non adj BMR torque arm (got that for free). only noticeable at highway speeds and seems to be wheel speed based not rpm. only able to feel it in the shifter and seems to stay at a consistent vibration level from 50-110 maybe Slightly more intense around 100 but generally the same. car is stock ride height and has a stock panhard. driveshaft is the same length as the stock one. looking for any input on where to go from here

Cpt.Derrek

iTrader: (13)

Even though you are at stock ride height I would still recommend checking your pinion angle.
https://ls1tech.com/forums/suspensio...l#post19123768

mjs1012

iTrader: (36)

I would get an adjustable torque arm. I have the same TA as you and a relocation cross member and I was lucky enough that my s60 change my pinion angle.