klunking noise

did any body ever have a problem like this? when i apply my brakes i get a klunking noise and can not figure out what is doing it. the brakes all look good, now i have coil over rear shocks and was wondering if that could be rubbing so i took some silicone and sprayed the shock body and all the rubber suspension parts and it stopped! now a week later it started again, i don't feel like replacing all the rubber bushings only to find out that is not the problem. any help?

Yes mine does the same thing...I turned the brake drums and it went away for a little while. Then I replaced the complete brakes except for wheel cly. and backing plate and put in new springs. Well two weeks latter its doing it again.... Please someone help us!