washer making pounding and rocking sound

Took a screwdriver and pried up the top of washer, then reached in and unscrewed the front two screws that allowed the front to be lifted off.
Removed two screws on lower right side that allowed us to pry open right side of washer. There are six springs along the bottom of washer that keep the tub stable and keep it from bouncing against sides while in spin mode. One of the springs broke and needed to be replaced. Off course it was the one that was in the far back and the hardest to get too. But by prying open the right side it was reachable. The wife pushed against the tub to make the spring stretch a little less but still was too difficult. We took the advice of another home repair guy and put quarters in the spring (about $1.75 worth) to make it stretch out, then it was simple to connect the two ends, remove the quarters and voila....it was done. Screwed theright side back on, but the minimum order on the springs was six and the others seemed fine, we just put the other five inside the washer cabinet, replaced the front panel, reset the clamps on top of the front panel, slammed the top down and we were back in business. The parts including shipping was a little over $10.00. So I am sure we saved at least $140 repair job.