Yes, make sure the grease holes are at 9:00 or 3:00. Also, don't twist the old bolts out, tap them out, they are pressed into the hangers, and if you twist them, you will widen the hole and they will spin.
Another thing, pre-test each one with grease before install. I had one or more (can't remember how many) that were not drilled through, and would not take grease.
This last trip was the first time in 4 + years that all of the shackles took grease with no problem. We do 2 fairly long trips each year, so I now will grease them before each trip.
Ford F250 6.2 Gas, 4X4, Short Bed, Companion Hitch
2019 Jayco 28.5 RSTS, MorRyde orbital pinbox.