When it comes to u-joints I prefer non-greasable for the added strength. Ball joints and tie rods, greasable is the only way to fly.
Sent while I should be doing something else
The "weak link" on some greaseable U-joints is when the grease fitting is mounted in the cross itself.
This is often aggrevated by people mis-installing the U-joints so that the
drilled hole (a stress concentration even though it is usually in a reinforced boss) is installed in the wrong position so rotational forces place the hole under tension (under compression is better)
Greaseable joints with the grease fittings in one of the caps is a
superior method to a fitting in the cross.
I will not install a non-greaseable U-joint in a driveshaft or as the "Center"
U-joint in a TTB setup
The ONLY place I would use Non-Greaseable U-joint is as an "outer"
in a TTB and even then I disassemble the joint, carefully wash it in solvent
to remove ALL of the "cheap as snot" factory grease, then carefully grease it with marine-grade synthetic grease (do it right or don't bother)
There is a way to have greaseable joints with no weakening of the joint...
And it's what I'm doing the next time I rebuild my outer shafts.
On TTB outers drill ALL of the caps (on a lathe) for flush mount grease
fittings, it makes it a tedious process to grease the front axle but you
KNOW the bearings get greased.
And the comfort of knowing the can be regreased.
BTW, when I want the RIGHT part I go to NAPA, if I want to have a long arguement about
which part is the right part I go to Advanced.
AD