Washer still making banging sound

My washer was making load banging sound during the spin cycle. I found both shock absorbers were broke,purchased and replaced both shocks. Did a load of wash and am still getting banging sound, not as loud seams to be coming from the rear of the machine. Checked the pulley seams to be spinning true, any ideas on what else could be making banging noise. The drum does not appear to be hitting the sides anywhere either.