So the story goes back a long time...When I purchased the 05 Tahoe back in 08 for my wife, I knew it was lowered but the sales guy said it was stock. So I have been slowly trying to track down the issues. I have replaced the rear suspension with SOCALS 2/3 drop with shocks, link ends and springs. I also have helper bags installed and free travel mod. Front has new Bilstein 4600, replaced tie rod ends a few years back. Spindles are stock. I have new sway bar links for front as well waiting to be installed. After installing the new shocks, it still feels like the shocks have 300k miles on them. Control arms look OK. Hitting a bump on freeway and it feels like the tires are bouncing. There seems to be no isolation and the ride is a bit jarring. Torsion bars bolts are about in the middle. 125k and zero rust! Put on 20" wheels and tires back in January of this year. They have been exceptional tires, Nexen Roadian AT Pro RA8. Ride is smooth and quiet. They did amazing in a foot of snow on the freeway and side roads. I have read many threads trying to understand the different aspects of the suspension, but no clue on my next step. PS - after years of being on forums, I still have issues posting pics - FML!