The "Marathon" SQs, introduced around 1981,were a milkstool/ rotating transmission/ clutch belt design actually quite similar to a Franklin design except all metal and no indexing basket/6 way wash action

I have an '82 and '84 in collection: quite loud, especially the '82 with metal idler vs plastic on the '84. These can fail to spin if belt slips just a little too much as brake won't release. Also i do not know who made the timers on early 1980s marathons, but timers have acted up on both machines: find washer stopped full of water, touch knob and starts back up to complete cycle ...