** Kenmore Washer Model number is 110.26844692. Loud 'racket' noise was a clanking sound as it was agitating **
Only when agitating and not spinning?
If only when agitating, if it is coming from below the tub, there might be a problem with the transmission. If from inside the tub, there might be a problem with the ratcheting system used by the top half of the agitator.
* Why would it fill again when the cycle is supposed to stop after the rinse cycle. *
I can't think of anything that would cause that besides a problem in the water timer (see the following link).