Southern talk is what it's all about......lol
the oil can be changed....but it involves removing the tranny as above, and opening it up.......
I have never done it on any of my machines....and I would only think it would need done, if water got in there, you were rebuilding it, or its really like a sludge....but for the most part, its a sealed unit....others with experience with this can chime in, but if it ain't broke, don't fix it.....
I don't think theres a spring in there, it just slides up and down according to the shifters position.....its been a long while since I had one of these apart....
I just think your machine has been sitting for a while, and things are stiff/stuck...and once you get them moving/lubed again.....you should be good to go on a regular basis....
did you try plugging it in and seeing if the agitation now kicks in?......turn your timer to wash, pull off the pressure hose from the outter tub, and blow into it....it should kick right into agitation mode.....
jumping back a post or two......LimeAway and "CLR" are about the same thing.....Calcium Lime And Rust remover......can usually be found at places like Kmart, WalMart, ShopRite....near the chemicals for cleaning the kitchen or bath....
wear gloves, and maybe a mask, its potent, but for many has done a great job....sponge/spray it on full strength, scrub the area, and rinse off!......
so far...your on a roll.........what's next?