Check out the picture- - - -an original equipment bushing is bonded together- - -outer sleeve, rubber, and inner sleeve. So far you have removed 2/3 of the bushing and left the outer sleeve in place.
http://www.automedia.com/Content/Articles/Images/res/res20011101br/res20011101br00.jpg?The movement of the bushing is supposed to happen between the bonded parts with the rubber doing the flexing. With the polyurethane "bushings" the control arm is just sliding over the surface of the plastic, not flexing like a rubber bushing does.
Jerry
Jerry, I think you are saying that the inner and outer metal sleeves do not move where they contact the rubber bushing in the original OEM design. I can only imagine that the tight pressure fit of metal against rubber is what prevents movement between these parts (in relation to one another). Vertical, horizontal and front to back forces are absorbed by the elastic properties of the bushing. Axial rotation is allowed via the bolt through the inner sleeve. As I examine this polyurethane setup, I cannot see how the mechanical properties of the bushing have changed.
Pretty sure the inner spacer pivots in the polyurethane shell on this replacement piece.
Here are some more pics of the polyurethane (PU) bushings and inner sleeve. The original bushing assembly outer sleeve remained inside the control arm. Using a rubber mallet, I whacked the larger PU piece into place and then pressed the smaller section onto the other side. Last, I inserted the new inner sleeve.
http://i618.photobucket.com/albums/...20Chevy%20C10/Bushing%20Post/BRP3000.jpghttp://i618.photobucket.com/albums/...20Chevy%20C10/Bushing%20Post/BRP3100.jpghttp://i618.photobucket.com/albums/...20Chevy%20C10/Bushing%20Post/BRP3200.jpghttp://i618.photobucket.com/albums/...20Chevy%20C10/Bushing%20Post/BRP3300.jpg
