[BruceH]

Very nice and welcome The "golf balls" sound is most likely your rear control arms. I just did mine and it makes a big difference. Pretty easy to do and it won't mess up your alignment. I used the 997 part and bought it on Amazon.

http://986forum.com/forums/diy-project-guides/60057-rear-trailing-arms-replacement-guide-diy.html#post479144

http://986forum.com/forums/performance-technical-chat/53590-rear-suspension-noise-over-tar-strips-6.html

https://www.amazon.com/gp/product/B00T9YIL40/ref=oh_aui_detailpage_o02_s00?ie=UTF8&psc=1