Rumble thump sound

I have a stack maytag washer dryer MODEL SG1000 and when its running it makes a noise like it has 3 towels and tennis shoe spinning around! any soulutions?? thanks

Here are your parts
Model SG1000

Here is a service manual
http://www.servicematters.com/maytag_library/docs/16000416.pdf

Usually this is the rear support rollers. Item 16 in Tumbler (Front & back) section.
May also be a paddle in the drum has come loose.

Open it up and check for wear, flat spots and bearing slop.
Might as well check out the rest of the parts. Like the belt, idler wheel, front glides, drum seals etc.
Give the inside a good cleaning including the blower wheel
Also clean and check the vent system