I believe I need a set of rear shocks, whenever I hit a bump, it sounds like im running on NO shocks, I dont get it. I even took it to a jag expert and he wasnt sure either, he thinks its wheel bearings but if it were wheel bearings I would hear the humming noise, there is NO noise like that, just a THUMP whenever I hit a bump. The car is super smooth on a smooth highway but rides horrible when a little bumpier. It almost sound like strut mounts or bushings as well, its mainly coming from the drivers rear side. Its causing inner tire wear bad.....im all confused on what it can be. If it is the rear shocks, which other models and years did the CAT suspension exist on?

 

For x308s sold in the US market:

Vanden Plas Supercharged / Super V8, 1999-2003
XJR, 2002-2003