Originally Posted by 4Jeepn
1310 153x is what I used from a TJ when mine blew..
The 5-153x is the greasable version of a 1310 size u-joint. That's a good choice if you specialize in regular deep soupy mud but the triple-sealed (non-greasable) 5-1310x is a much stronger and more durable u-joint that would be a better choice for the rest of us. Cross-drilling a u-joint body to make it greasable weakens it. 100K+++ miles is very realistic minimum
mileage I'd expect out of the sealed non-greasable joints in most uses.