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The telescope function on my steering column stopped functioning this morning. After finding and reading this thread, I pulled the steering column apart only to find the black screw had already been removed.
I started looking at all of the moving joints and the original six-year-old grease. All of the joints were almost dry to the touch with a bit of black grease on the screws. I ended up lubing everything with white lithium grease one function at a time, checking for changes in motor sounds after each. After moving everything on the column around a couple of times I took a rag and cleaned everything up.
I'm not sure if lithium grease is the preferred lubricant I can say the servo motors sound a lot healthier.
Those in extreme temperatures, those tight tolerances mixed with expansion and contraction of the of the metal may be drying out those connections. The steering column has a lot of metal on metal moving parts for two small servos.
I would recommend putting a rag down before greasing anything.
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