Whirlpool Dishwasher making noise in wash cycle

[csb2960]

I have a Whirlpool dishwasher and it is making a loud noise/rumbling during the wash cycle. The fill and drain cycle is quiet like it’s brand new. I checked the chopper assembly and it would turn and no foreign objects in there. The dishwasher is around 7 years old with normal to above use. Is there something else I m missing or is it the motor? I have a video I can text or email to you. Thank you for any information you have…