Depends on what (if anything) is wrong with it. Some failure/failing
modes may be noisy, others can be silent. The noisy ones might sound
like grinding or scraping, or any of a number of other sounds.

In other words, it's going to be tough deciding what the problem is, and
even tougher when you can't be *SURE* that it is indeed the TC making
the noise. There's a whole bunch of things on a car (or truck) that have
the potential to make grinding noises, and until you can pinpoint which
of them is the source, you're just chasing your own tail.