2004-2007 Cadillac CTS-V Performance Mods Discussion, Ground Control coil over install in Cadillac CTS-V Series Forum - 2004 - 2007; Got the FAQ info but lost the GC install sketch I received with them and assuming it is the same ...
I have not installed a Ground Control setup myself, but the thrust bearings presumably go where the key grease goes which is above and below the springs where the spring contacts the perch. The noise is caused, at least in part, by the rotating action of the springs against the perch surface as they compress and decompress.
Automobile(s): 04 CTS-V with a little hp persuasion device
Re: Ground Control coil over install
I must be really lucky cause my car sounds stock as far as suspension goes. No sqeaks rattles or anything. I did add some spacers in the back when I installed them so maybe that's why there is no clunk?