We just had the suspension rebuilt on our 2006 Cougar bumper pull. New axles, new springs, new hangers, new equalizers, new bushings. Also the axles came with new brakes, new hubs and races. All movable parts have grease zerks.
The back axle on the passenger side was bent, don't know how it happened but the tire was worn down bald on the inside.
I should have taken pictures of the old parts. Way past due for replacement.
I think it's better to take the weight off of the suspension to get a better idea of what kind of condition the running gear is in.