The sound is dfinetly louder when cold engine, the sound is like if a metal piece is hitting a rotating object, the speed is above 10 and below 25mph, and it sounds louder if I give it more gas. It also happens when I'm driving only, and mostlikely when the transmission shifts between 1st to second and during second. Also if I floor it or start full blown on first to fifth gear, the sound is gone, and driving speeds above 30 no sound at all untill I completely stop and go again. (like a stop light)
I don't know what more details... besides is loud and it comes from the middle front floor of the interior of the vehicle, like in the front of the division lump on the floor between the driver and passenger seat.
I can't find what the problem is..... :(