Thanks for the response. Would the symptom for needing the seal kit be leakage underneath?
Checked underneath the "hood" and definitely is the main motor/pump. Just finished removing pump impeller, housing and cleaned a couple of hard items out (olive pit, walnut shell) and put it back together and noise may have gone - ran a quick rinse and then cancel drain with no noise. running through a normal cycle now and so far no similar noise. Will report back