None supplied with new TRE's, but they can be installed. I located the update parts (CBUEN491AC) and upgraded the linkage myself and added the grease zerks. The 1/4" zerks with the tapered threads seem to work the best. Drilling with one hand and holding the shop vac hose stopped any metal from getting inside the TRE, hole was just small enough to let the zerks tighten into the end.
Thank you much for answering my question!!! I was hoping that would be the case....did you simply drill up into the bottom of the TRE on each side?? Did you use a straight zerk or a 90?? Got a pic of one end or the other with the zerk????