weird noises 71 ltd

hi, hoping someone in here has had a similar car with similar problem....car makes noises sounding something like birds chirping...I think the noises are from the back but hard to tell....I repacked the
front bearings....pulled the c clips from the differential and took the axles out and checked the rear bearings and they looked good(wish I didnt do that, it was hard to get the gears right)....the u joints have fittings so I greased them until old grease started showing.....after doing all this I have driven the car to ny from ga twice and the noise is still there...also tightened the belts up front but didnt think the noises were from that direction....any ideas? forgot to mention, I not the first owner of this car and it sat for many years, I had to remove a bunch of rust from the bottom mostly passenger side and spray undercoat....thanks for any advice
Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload
Remove the wheel covers ( if any) and check if noise is gone

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

Motorsforum.com is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.