Hello guys, my 1990 525 is nothin but problems today! anyway....

I went to go back out of my garage after checking plugs + wires because of a stumble at 2k rpm and I hear "CLICK CLICK CLICK CLICK" from underneath th ebeast. Well, I have someone help me find where it's coming from and its from the back of the car, underneat - around where the differential is located. (or so it seems) but it only does this under weight. With the car jacked up and in drive, mash the gas.. nothing. Drop it back down and heres the noise again. Not constant either, sort of intermittent, but occurs VERY VERY VERY often.

Any ideas guys?

Thanks a million.