Both transmission arms move freely by hand. I removed the vacuum motor (again) and on the bench, I added several drops of ATF with the slider switch in the "ON" position. I worked the motor by hand to distribute the fluid. After that, I hooked up an extra piece of vacuum hose from the manifold to the wiper motor. After starting the engine, I ran the wiper motor for a short time. I replaced the vacuum motor in the car, installed both wiper arms and sprayed the glass with water. Ran the wipers for a short time and they BOTH seem to be working fine. Last summer, I did take apart the wiper motor to clean up all the old grease and dirt from inside and was able to save the gaskets. I read online that the grease that Trico used was very close to petroleum jelly. So that's what is in there now. The next thing I'm trying to figure out is adding an A/C vacuum reservoir so the wipers do not slow down when accelerating.
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