Spicer 5-1310-1X u-joints

Hey all,

Wondering if anyone is using the 5-1310-1X u-joints?

These are in between the 5-153X greaseable u-joint and the 5-1310X non-greaseable "life series" u-joint.

The 5-1310-1X has a grease zerk on one of the caps.

Personally I have had very good use out of the 5-1310X u-joints and don't plan on switching away from them.

Thanks!