98 sportsman 500 rear suspension binding

hello guys
I have a 98 sportsman 500 and the rear suspension is binding up. After a ride the rear is bottomed out. If I lift up on the rear rack the suspension works as it should compresses and rebounds fine. I removed the rear shocks, tires and sway bar links and jacked it up. The right side is smooth with no binding at all when I operated it by hand. The left side however is binding up. I removed the bolt that hold upper a arm to hub and moved both A arms. They were both free and smooth. When I put the bolt back in the a arms bound up. If I lift them all the way up they will stay in that position until I push them down again. Could the bushings be bad? Could the shocks be blown and not returning the suspension to normal position? Any help will be greatly appreciated
Thanks

98 sportsman 500 rear suspension binding

hello guys
I have a 98 sportsman 500 and the rear suspension is binding up. After a ride the rear is bottomed out. If I lift up on the rear rack the suspension works as it should compresses and rebounds fine. I removed the rear shocks, tires and sway bar links and jacked it up. The right side is smooth with no binding at all when I operated it by hand. The left side however is binding up. I removed the bolt that hold upper a arm to hub and moved both A arms. They were both free and smooth. When I put the bolt back in the a arms bound up. If I lift them all the way up they will stay in that position until I push them down again. Could the bushings be bad? Could the shocks be blown and not returning the suspension to normal position? Any help will be greatly appreciated
Thanks