Originally Posted by Jim_in_PA
There was discussion in the lowering links thread about alignment. There seemed to be agreement that reasonable lowering (an inch or so) isn't affecting alignment, but someone did post recently in another thread that they had alignment issues with a non-QL lowered vehicle relative to camber, if I recall clearly. It's not hard for me to imagine that trying to run the vehicle "way down low" is going to have some impact on alignment given you're at the end of the designed suspension travel. There's little impact at low speeds, such as what you might be at with the normal park mode, but when it's slammed at high speed, the geometry is pretty far from what was designed. Now I'm speaking without any real personal knowledge, but that's what would make sense to me logically...
I certainly agree. While I can look back 20 years, when I lowered my '96 Z/28 Camaro, with a set of Eibach springs, and I elongated the adjustment slots on the frame, I think that it would be significantly more difficult to do the same, on a current GC. The main difference, as I see it, was with the Camaro, I didn't have to worry about affecting the working length of a pair of CV shafts, which are connected to the front differential and drive hubs. And at the same time, just to get at these slots you have to remove or slide aside, some heavy components, that aren't present on a RWD vehicle.
As I may have mentioned in a different discussion, it appears to me, that the a-arm pivot bolts on my Jeep are already to the far inner end of their adjustment range, so that also has me leery of lowering my Jeep, even by an inch........as much as I'd like to.