986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Very scary knocking sound from back of the car

Ghostrider 310 · 08-27-2012, 12:20 PM

Speed sensitive knock (one that increases frequency with vehicle velocity not a raise in engine revolutions) is likely rotational, in other words CV joint, wheel bearing, rotor pad, tire wheel.

08-27-2012, 12:20 PM	#8
Ghostrider 310 Ex Esso kid Join Date: Dec 2005 Location: NY Posts: 1,605	Speed sensitive knock (one that increases frequency with vehicle velocity not a raise in engine revolutions) is likely rotational, in other words CV joint, wheel bearing, rotor pad, tire wheel.