AGITATUB MECHANISM FAILURES
The worst failures are the main water-seal which if not found in time will ruin everything. Other problems were the multi-disc clutch and as Peter suggested the agitate cables would break and belts which were actually easy to replace. The belts were only sold in matched pairs so you always want to use them in a pair.
We saw quite a few of these machines that lasted nearly 20 years IF they were very lightly used, but if you tried to run say 10 loads a week in them they didn't last very long. The dryer part of the machine was far more troublesome than the washers. I spent many hours behind these dryers replacing bad blowers, idler pulleys, belts drum rollers, broken lint filter housings, bad motors and motor mounts, bad heating elements and on and on. Frigidare had quite a few fires with the heater design on these dryers, which is why WCI redesigned the heater box in he 1980s. And when these started to show up under the GE Space-Maker name in around 1986 GE made them change the dryer door and washer lid to metal to prevent fires from spreading. I always said that it was a good thing that Frigidare didn't try to make one of these in gas.