[ggoose]

Suggest getting a second opinion. Ask around for trusted shops and schedule a visit asking about the noise; do not suggest the PSP or alternator, let the shop identify the source. Ask the shop to inspect the vehicle and make suggestions as to work that may be needed and to rank the repairs from critical to can wait. There may be a diagnostic fee charged, typically 1 hour of labor but is typically credited back if the repair is done.

If it is the PSP, suggest replacing the fluid first. ATF+4 is recommended. I use a turkey baster and empty the reservoir, refill with atf+4, and drive around the block. 3-4 times will replace most of the old fluid. around 2 quarts.

When under the engine, snug up the oil pan bolts. I found the pan bolts on my 2014 could be snugged up a bit.

Check the valve cover for oil leaks. I replaced the gasket after tracking down the oil drops under the engine up past the timing chain cover to the passenger corner of the valve cover. No more drips.

Common point for transmission leaks are the two lines from the trans to/from the cooler, typically leaking where the metal tube meets the rubber hose.

As a note, it is a common practice to 'look' for additional work. Nothing says you need to authorize it and have it done then.

 

[ggoose]

The idler pulleys have also been known to be noisy as they begin to wear and can be another suspect. Being able to isolate the source of the noise will keep you from replacing good parts.