hi i have a 04 Durango slt 4.7 4x2,my first problem is a clack sound like metal to metal when i turn the steeringwheel and pres the brake at very low speed,like 5 mph,i have replased upper control arms,outer terminal,lower ball joint and sway bar links,what could it be???

second problem is in the road ,at medium speed but in low rpm the cage start to vibrate,if i press or release the gas peddal the vibration got away,what could it be??
i cheked the u joint and its in good shape,.....
help please

 

sorry for my inglish,im from PR.

 

Do the Torsion Bar ,need to have any kind of grease?