Hi, i need help with F23A on RA6 odyssey automatic tranny, i heard softly knocking noise not so loud but hear it on driverside and outside the car. I lifted the car, and looking for the source, found out it was from the rear edge of the engine, not from tranny. my question is, does anyone come up with this problem ? (the sound is not like piston rod noise), is there any bearing on that area of the engine ? (right behind rear main seal)
thanks, i'm sorry if this is a silly question, but it is difficult to get part for this particular engine in my country....

 

the noise source from the circled area, with oil pan attached i tried to hear it with hearing tool, it came from that area, when i moved slighty left or right further from the circled area the noise faded out. Anybody have an idea what it might be ? thanks