Found the below links helpful explaining panhard bars and 4 link suspension setups
http://www.afcoracing.com/tech_pages/panhard.shtml
http://www.afcoracing.com/tech_pages/4link.shtml
http://www.afcoracing.com/tech_pages/panhard.shtml
http://www.afcoracing.com/tech_pages/4link.shtml