Rattling sound in reverse?

Yesterday I installed new muffler on my Ford escape 2001, but ever since I've done So I've been hearing very loud rattling sound everytime I'm in reverse and pressing on the break. Any idea why? :/

Hi so it has not been fitted right and is knocking on the body of the car.

  • I have a 2000 Ford Taurus Sedan that has a screeching metal on metal sound when switching gears to reverse? And the sound is there the entire time you are backing up. Does this sound like a transmission issue? Also hearing a rubbing noise in the steering, and it is a little tight, any idea what that could be? Also heater blows, but not real strong and no heat comes out… Does that sound like a difficult and expensive fix? And could the heater or any of the above issues cause my engine light to light up solid continuously? The car runs pretty good aside from these issues.
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