2001 Mercury Marquis Squeeking noise and clunk noise

Other Category problem
2001 Mercury Marquis 6 cyl Wheel Drive Type unknown Automatic 71700 miles

This started about a month ago. When driving the Marquis at around 40MPH or less I can hear a squeeking sound coming from, I believe, beneath the car. Once I hit the freeway it goes away. I just had the tires rotated and an oil change, so I don't know what it could be.

Just moved to the Bay Area and I had to make a sharp U-Turn that I've never had to do on a narrow road. The car made a loud clinking noise when the wheel was turned completely to the left and I was stepping on the gas to make the U-Turn. I thought the car was going to die but once the car completed the turn the noise went away.

Any help on these two sporadic noises would be helpful.
Thank you!