I recently installed mild lowering springs and shocks. Afterwards, and I believe it's primarily in the rear, when the car shifts weight front and back there's an audible click. It does not persist after the initial weight shift. The sound is more prevalent when on an incline/decline. Bumps make no sounds and left and right weight shifts also make no sounds. Thoughts?

Shocks: Bilstein B8 sports
Springs: Eibach Pro-kit

 

Any ideas?

 

Most likely its your end links, very common to creak/tick.

Next guess would be axle tick...there is a TSB for this, to fix you remove the halfshaft and grease the flange on the hub side with moly grease.

 

Yep, it's the axle click. Dealer should charge about an hour to fix.

 

Axle click just from shifting weight back and forth? Never at all during driving, which I thought indicated axle issue.

 

Yes. With an auto trans, you can make the noise by brake torquing in drive, then reverse, then drive, etc...

 

Just for some thread closure, I had the car aligned yesterday and the click has stopped. I don't know what the tech did outside of simply aligning things, but my thought now is that the previous alignment resulted in parts that were close enough together to audibly hit.

Thanks for the other suggestions!