Rear squeaks on Super's often some from the shock bushings. They're urethane, and have no zerk fittings for effectively lubing them. The lower control arm bushes are hard plastic and do not squeak normally. If you did remove one of the allen bolts getting them back in can be a problem. You may need to mark the current adjustement on the adjuster cams, loosen them to allow you to get the bolts started, then realign the suspension by lining the marks up again. Torque the allens to 90 ft/lbs and use loctite red on the cleaned threads before reinstalling.Don't take the rear susp. apart to avoid this hassle. Back to the squeaks... just spray the red urethane bushings at either ends of the shocks with a spray lubrecant at every
oil change. Urethane is squeaky when not slippery.