bought a 2009 gx with 140K miles on it. Just had all the fluids flushed. when the temps drop below 25 degrees I can hear a very faith gear noise that seems to be coming from the transfer case. If i pull the 4h/4L lever towards the center it seems to decrease. does anyone else have this? is this considered normal noise? I am coming out of a 4Runner and never had noise but that was also a switch from 4H to 4Lo.