Relatively new owner, still kicking the tires and doing all the preventative maintenance.. and I was under the impression that the 2WD did not have any grease points in the driveline. While crawling around under the truck tonight I came across these…. One on either end of the driveshaft. Tight fit, not sure I could get a gun on them even if I wanted to. What are they and what am I missing? They don’t look like the spider joint zerks I’ve seen on the 4wds. It’s a ‘07, RWD, 228k,AT, no locking diff.