I noticed that when I back up out of my driveway (uphill but may not matter) I hear a clicking sound from the rearend. I do not know if it is related to the brakes or the rear end or some interlock system? I have only noticed it in my driveway in the morning. Car is a 2004 Limited with 30K on it now. I noticed the clicking a year ago but it seems louder now than before. It is gone when I put it into 1st and start driving (6 speed). Original brakes still in, changed all fluids when I bought it and no signs of any problem with rear end fluid. Someone must have had this noise. I have found all my other problems listed on this forum. Thanks.