Rear clunking. Is it this?

[911monty]

What I did and made it the easiest work I have done yet is, 1. Back up on ramps. 2. Jack wheel off ramp. 3. Turn ramps around (backward). 4. lower tire back on ramps. With ramps in backward you have full access to the control arm without ramp in the way. Remove bolt on front of control arm. Remove rear bolt on coffin arm. Slide arm out. Place new arm in position and start bolt in coffin arm (do not tighten) install front bolt and tighten. Now tighten coffin arm bolt, (this keeps bushing in neutral state). Repeat other side. Now turn ramps around and drive off. Took less than 20 min per side.