I appreciate any help that one of you gurus can provide on the below.
These forums are great and have helped me a lot.

2001 Nissan Maxima, 59k miles.

I notice that ONLY ONCE per day, a screech, squeal occurs for about
3-5 seconds.

Situation: Car in garage. Car driven into garage (not backed in).

Start car. Fine. Can turn steering wheel left and right-Fine no
problem, no noise. perfect.
Engine sounds fine, car is not shaking, no rattles.
Can gun engine while still in park--no problems or sounds.
Can start car with AC on or AC off does not matter-no difference on
result of below.

NOISE-If I put the car in reverse and start to back out of garage, I
immediately hear a loud screech for 3-5 seconds and then it stops. I
notice no other abnormality. No loss of power, no loss of braking, no
loss of power steering. If I simply put in reverse with foot on brake,
no noise.

So, I sprayed some WD40 on both belts as best I could. Hard to get
much spray on underside of Steering belt or whatever that belt is way
down below.

Start car, next day---no sound-Great. 2nd day, no sound. 3rd day-
slight sound for 3 seconds.
4th day--back to 3-5 second screech.....

So I am thinking it could be a belt.  But I am an idiot female with no
car knowledge.

HOWEVER-why only on reverse and why only a few seconds???

I have searched the Internet and read everything from engine mounts to
idler pulley to tensioner, but heck I do not know.

Hate to take car in to Dealer or independent when it only occurs once
a day.

Thanks so much.

Sincerely
Patty