Chaz -
The model number probably doesn't have the 9 in it, otherwise it's a 110.82070120. That is a 70 series five-cycle machine, 4 levels, three temps. very popular, good middle line machine. A 1980 model.
If your machine is squealing in spin, I am tempted to suggest dry bearings. I had never heard that in a short centerpost machine (1978 -1987 production) until two years ago, and again recently.
The first time, I had taken down my 1979 machine a couple times (once to correct a non-spin condition after it had been in storage for 8 years) and again to seal the agitator shaft which I should have done when it was apart the first time, and each time I did that, the machine lost a certain amount of centerpost bearing turbine oil, which drips onto the cabinet and floor. I like to work on my machines partially upright, and gravity allowed the oil to drip out. It wasn't a lot each time, but there is only a couple teaspoons of the oil in there to begin with. I finally stuffed a shop towel into the lower bearing to stop the drips, but foolish me never thought about replacing the oil. DUH!
So, about three loads of laundry later, it began this awful howling during spin. I knew what it was pretty fast and quit using it until I pulled it down AGAIN and re-oiled it. It has been fine since.
Now I have a different machine doing that. It is quieter but you can clearly hear the spin-tube whipping around in the bearings. Metal on metal.....I am not using it until I check it out, but I expect to find it lacking oil too.
Your machine if it has sat a long time in a warm garage (we know how warm they get here in Charlotte), it may have lost it's bearing oil simply from age and a lot of sitting around. Sometimes I'll find a basket drive brake pad saturated with oil. Your model was made from fall 1979 until mid-1981 when the entire line got an internal major redesign (baseplate, tubs & baskets) and new 1981 models were introduced. If it is 31 or more years old, it very well may need centerpost oil. I wouldn't be concerned about the bearings being worn, they seldom wear out in this short centerpost design, unless they have been floodeed for many years of centerpost leakage and many many miles of operation. Your machine doesn't sound like it has had enough use for that, but running the bearings dry definitely will increase friction and wear.
If you want to bring it by here sometime this summer, we'll give it a once-over!
Gordon