Whirlpool Washer knocks in every spin cycle regardless of how many clothes are in it

I’M NOT SURE OF THE AGE OF THE MACHINE. IT KNOCKS IN EVERY SPIN CYCLE. I’VE REPLACED THE 3 BIG SPRINGS,BUT NOT THE ONE LONG ONE YOU CALL THE SUSPENSION SPRING. I JUST MOVED THE BOTTOM OF THAT SPRING TO A HOLE IN THE FRAME TO SEE IF THAT HELPS. SHOULD THE SKATE PLATE BE SECURED WITH SCREWS BECAUSE I DON’T SEE ANY SCREWS IT IT? IT DON’T MATTER HOW MANY CLOTHES ARE IN THE MACHINE, IT SOUNDS LIKE A VERY HEAVY UNBALANCED LOAD IS IT IT. HELP !!!:confused: :eek:

No, but I would have replaced the skate plate along with the three springs.