A few weeks back I decided to finally do a job that has been nagging at me, new U Joints for the drive shaft.
The original factory ones are not greaseable and when I got the two of them off you could see that, dry as old bones they were.
They were dry and the rollers had long ceased to roll, so they were replaced with Moog parts off RockAuto.com which
came with these odd grease nipples.
After investigation I had to buy this, off EBay.
U Joints are not high on the list of parts to worry about, but after seeing mine I should have been.