If you've noticed that your Swivel Balls leaked, it means the CVs are runnin dry, which will eventually lead to a dead CV, so change the seals if need be and fill up the swivels with the LR Grease first as preventative maint.
The clicking/clunking sound is the most obvious symptom which will be heard first at Full-Lock wheel positions (extreme left/right) and while backing up or slowly moving foward. It will progress to a terrible clunking sound even when taking a normal turn. (could be while making left or right, dependant on which CV is damaged) A really damaged CV will also be noticed when during braking, a single Click will be hearf/felt when nearing a complete stop in a straight line.
That's all I've got for now.