After hearing a much different noise then normal and the dishwasher not cleaning I have narrowed the problem to this:

The Impeller (AP2109089) is hitting against the housing and as a result is not turning. I can push it in and it will spin properly, but will eventually get stuck again when the motor starts up that cycle and throws it out.

According to the motor & pump diagram I know I need to replace one of the following:
55A (mount or bracket - not sure which is A)
59, 59A (Oring)
7 (Blade)
57 (Drum)
12 (Impeller)

Somehow over time one of the above parts failed causing the impeller to push against the housing and freeze up. I need to know how to remove the above said parts in order to determine which needs replacing. I can remove the little screw holding the impeller, but that doesn't allow me to remove anything.

Hope this is clear. Please advise!

Gene,

I appreciate the info as it helped a lot. I narrow the issue down to two parts that I just ordered through Appliance Parts Pros. While trying to get the motor back in (used vaseline) it doesn't seem the Bracket-motor,front sits flush with the housing. What am I doing wrong?