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					Originally Posted by 406Special  Take a look at the wiki on 4WS.   http://en.wikipedia.org/wiki/Steering 
Although not comprehensive I can also tell you about Porsche 928 with   
its Weissach rear axle with passive rear steer.  http:// 
en.wikipedia.org/wiki/Steering
 
Having owned a 928 for more than a decade I can vouch for the balance   
and security a passive rear steer provides.
 
Clyde | 
	
 Thank you for sharing your experiences of the 928.  I'm a great admirer of them.
Passive rear steer is built into all modern cars.  Semi-trailing arms and live axles, characteristically, generate passive rear steer.  Other suspension systems achieve passive rear steer via their suspension geometry.