Kenmoore does not actually make machines they sub out to many different companies then put there name on it so the model # is important for the first three numbers will tell us who made the machine.
Are the marks oily or appear dirty? It's common for top-load washer to harbour alot of nasty stuff in the tub that you can't see without removing the basket. Also looking in the cabinet will tell alot if you see oil splattered around the interior you are looking at possible transmission...sometimes you can get away with a tub seal kit to keep you going though.
model will tell us how to help you more specifically.