I'll check which one is 'economical' for me lol!

Now i just remembered, this first happened after I had my car washed. It was a manual wash that time and the wash boy might have sprayed so much on the alternator?

Aha, I have one more observation. I wonder if anybody has encountered this before.
I hear a sound like to metal rubbing during 2-3 gear shift.
The atf will be flushed thismthursday as well and hopefully would get rid of the sound.