What is the loud noise when you first start up the car in the morning?

What is your question?

The engine sound is loud when the car is first started. As you drive, the noise reduces or goes away. When the noise is the loudest, the car vibrates. Also,the steering is tight.

What makes this problem better or worse?

When the engine is cold

How long has your 2000 Lincoln Continental had this problem?

Ever since the mechanic installed new front brakes and pads.