On my 1992 525i automomatic I have recently noticed that when stopped and the car is in drive, when I take my foot off the brake I hear a klunking noise which sounds like a worn driveshaft/u-joint. About a year ago I replaced the flex disk and center bearing and I inspected the driveshaft and u-joint and they appeared okay. Now the car has 177,000 miles on it and I am hearing this noise. Also, when the car is just starting out sometimes I hear a clicking noise. I think it may be a faulty u-joint. I am looking for confirmation. What do I need to do to be sure before I order a $500 driveshaft with new u-joints. Unfortunately the u-joints can't be replaced and your need to buy the whole drive shaft. Any help or comments would be appreciated.

Al Gray