Here was the problem noise again last night (it didn't come up for over a year)
Can is driving normal, shifting fine...but then when I was on my driveway and wanted to put the lever in P shifting through N/R/P it mad this noise but only in N and P.
I shifted back into R - no noise- shifted again back into N- noise- then D- no noise.

I had this problem before (I posted it). I thought I had something bad inside the transmission, exchanged the filter and fluid...but never found out what it was.

As the metallic whining sound is exactly like when you have a running engine and turn the starter key....the question:

Can it be that the ignition/key is not retracting and the starter wants to engage in N and P?