I have a 2001 Mercury Sable with 185,000 miles. One month ago we replaced the following: In the front: Struts and strut mounts, Springs, ball joints, sway bar ends. In the rear: Struts, Springs.

Immediately afterwards, the front end popped slightly if you hit a bump. Now, front end is real noisy. Just driving down the road it rattles. Rear, now is sagging. When loaded (back set passengers) it just barely clears the tires. Any suggestions?