Top suspect for me would be the drop links from the ARB to the wishbone. You can either replace with new (about £20 each) or a cheaper method is to remove them from the vehicle. Before you undo the nuts clean the threads as much as possible with a wire brush or a rotary brush in an electric drill. Once off, carefully remove the rubber boots over the joints. You can then clean out any dirt and old grease and re-lubricate. I use a thick oil, pour a bit on and work the joint while clamped in a vice. As you work the joint you will notice the oil getting dirty, clean this away and keep oiling and working until the joint feels smooth. Wipe off the oil and now do the same with grease. Once the grease is worked in, put a blob in the boot and re-assemble.
You should now have nice quiet drop links!
Have a check of the bottom ball joints, track rod ends and the wheel in the air and weight off the joints. Wishbone bushes, it's usually the rear bush that fails, check with a bar in between the subframe and the wishbone. Excessive movement means either replacing the whole wishbone (15 minute job) or replace the bushes (long job)
Shot rear bush
Compare with a new one
Old Ford Cortina void bush tool used to replace wishbone bushes
I've used this tool to remove the front bush but the rear mushroom bush will need a longer bolt to allow fitting.
