I am having alot of trouble trying to grease these 4 zirk fittings on the trans/transfercase shaft. Bought a more narrow grease tip to try and get in-between the tolerances but none so far are working. Can't get a 7/16 wrench in to even loosen them to change the angle. Anyone have ideas? I was going to look at a needle tip grease gun but other than that the shaft knuckles will have to come apart to reach them. Anyone else have any ideas?