Jimmy,
You may just need to disassemble, clean, and lubricate the cross tube. The grease fitting is replaceable too.
These parts do wear out. If you have a lot of side to side movement at the peddles, the cross tube, and or, the heavy peddle arms are showing signs of wear. Even the bracket that holds the tube to the frame can be worn and cause the sloppy peddles. It is welded, so it does take a little bit of effort to replace.
Tim