Rear suspension bushes
I posted this last November, the squeak came back a week or two ago, I cleaned the bushes again removing the grease and spryed them with silicone spray as the grease attracted dirt
Hope this helps
James
"I have sorted a rear suspension noise, it sounded to me like a chirrup when going over light to moderate bumps at low speed, some of the guys that helped me said it was a knock or bump. I discovered that the void bushes where the rear beam fits to the body have holes moulded into them and what apears to be a sliding surface, on my car these holes had filled up with mud and road dirt, (one of them had a small stone in it), and had dried out, the nose became less when the roads were wet. You can diagnose this with a pry bar between the beam and chassis close to the mounting point using quick hard pulls, (car on the ground with the wheels on), I took off each wheel and was able to thread some rag through the holes to clean them, then I pushed in some rubber grease, it's a tad awkward to do but the noise has now been gone for four weeks or so.
Thanks to CHRI55 who discovered that mark 4 Golf void bushes are the same except for the hole diameter which needs to be increased, he used a set to replace the rear bushes on his Civic without buying an expensive complete rear beam."