squeaky front end

[bigmoe]

When I built my truck I used a square body front crossmember and A arms. The A arms had new bushings installed. Spindles and other components were new. Aftermarket swaybar has grease nipples where it moves in the rubber bushings. I have a very annoying higher pitched squeekedy squeekedy squeekedy in the front end. It's noticeable on ripply road that's just slightly bouncy. I doesn't squeek on bigger dips in the road or when the front end dipps on moderate braking. I can't easily reproduce it in the shop by bouncing the front end. Any ideas?