Spin Cycle Crazy banging acts highly unbalanced

My Kenmore 100 series runs fine except for spin. If it is empty it runs okay. If I add one sock (not exaggerating) it bucks like a bronco, jumps all over knocks holes in the wall, tries to tear out hoses, and sounds like a rhino is ramming a Humvee over and over. I checked the belt, pulley, motor, and the four shock absorbers. I installed 4 springs to the shock absorbers as someone else suggested this (there is a spot for the springs apparently some models did not come with them installed.) It acts crazy, it jumps off the ground, I can barely get to the shutoff switch and sometimes have to just pull the plug. What could the problem be?

The wash load is perfectly distributed and balanced. It sits perfectly level on all four legs.