Possible pump motor bearing failure?

[kballard72]

Full Prime, no air in basket. If there is air it is somewhere between basket and impeller, unseen.

Skimmer is full of water when this is occurring.

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door swings and plenty of water flowing

Would the diffuser O ring cause this issue? How about the diffuser itself?

The o ring between the two halves (exterior that the 6 bolts snug up), am I correct in that, that is pressure side and if an issue that would leak water...

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Additional note: Shaving creme

Foamed up all the joints from the valves to the union, basket lid, and the two plugs... no signs of air being pulled through exterior suction side joints or gakets.

Basket side remains clear of bubbles...

It sounds like maybe the diffuser O ring is not letting the pump fully pressurize and causing the chattering? Or shooting blanks...