Hi,Welcome to Just Answer, My name isXXXXX will be helping you with your appliance issue today.
The most likely cause for this is something that jammed into the pump,there is a there is a round cap in the bottom right corner front of the washer, open this And behind it will be the drain pump and trap assembly, unscrew the trap counterclockwise and pull it out and check for obstruction in the pump and trap assembly, it sounds like it may be a lot of water in this machine still so you want to be real careful. Only open the trap little bit at a time and sop up the water until no more is coming out then you can remove it totally, if there's no obstruction in there you may have had the drum lock up and it may have burned the belt in the back, check those things that let me know what you find, thanks, Bryan
When I get back to the clients house, I will get wet vac and open the pump. You think the noise and smell is coming from the pump / pump motor asm?