After grenading about a dozen 1310 u-joints, I made the switch to 1350 at my t-case. Here's some stuff I learned in the process. 1) You cannot run 1310's in a fullsize with big tires. You are on borrowed time. I tried at least 6 or 7 different brands of u joints and greases, and they all eventually ate it. 2) Spicers and PDQ's by Neapco are the best by far. The Pdq's have small relief cuts at the end of the trunnions to allow grease to fully lube the cap and bearings. This helped tremendously when greasing my joints. 3) DO NOT BUY BRUTE FORCE! They are a complete waste of money. Just pop a cap off and look how thin the crosses actually are! The grease channels are at least twice as big as some of the others. I think I could throw it at a wall and break it. 4) Slick 50 one grease worked the best for me. It has a high drop point (560 F) and tastes great! Now that i'm running 1350's at my case and diff, I hope to get more than 100 miles before having to swap joints. Time and torque will tell.