Pinging sound coming from rear

[lunchbox16]

i just installed new koni gold struts and new front rubber mounts. this week i installed new hankook ventus tires. car rides great but when ever i hot a bump there's a ping in the rear. i took it back to the shop that did the suspension and they looked over all the bushings and sway bars and they found nothing but heard the noise.
my question is what is it? have any of you guys had this issue?

 

[sosube]

I just replaced my Rear Sway bar on the Mazda 5 with a MS3 rear bar and heard the ping and rattling/banging sound . Check and tightened your end link nuts and mounting bolts. Need to torque them properly! Use Red Loctite. Drive the car on a ramp with the suspension loaded for adjustments... I don't think it should matter though. Hope this helps.

Brad

i just installed new koni gold struts and new front rubber mounts. this week i installed new hankook ventus tires. car rides great but when ever i hot a bump there's a ping in the rear. i took it back to the shop that did the suspension and they looked over all the bushings and sway bars and they found nothing but heard the noise.
my question is what is it? have any of you guys had this issue?