Rear suspension problem

[TBay Sledhead]

The problem that I am having is that when I compress the rear bumper it does not come back up all the way. With spring set on 1st clip the rear of the sled would drop 2" under it's own weight. Set the spring on the second clip and now it will hold itself up but when you press down on the bumper it will not come all the way back up, approx 3" less. The shock has been rebuilt, all bushing and bearings are in good shape and greased.
Also tried with the heavier spring, same problem. Also tried leaving all the pivot ponts loss to check for binding.
Anybody have any ideas.

 

[ualav8]

I have the same problem