After a little research....
According to the Dana/Spicer info... the u-joints should be lubed with lithium based NLGI-2 EP type grease. On one of their sites I found the the following -
"Dana recommends lubrication with Spicer ultra-premium synthetic grease or Chevron Ultra-Duty EP-2 or a compatible lithium-based grease meeting N.L.G.I. Grade 2 specifications as well as ASTM D4950 LB specifications. Spicer ultra-premium synthetic grease is compatible with all NLGI-2 greases, and delivers professional-grade quality, even at high temperatures. Spicer ultra-premium synthetic grease is available in 10-packs of 14-oz. tubes (SPL1051), and 1-gal. pails (SPL1052)."
Went ahead and ordered a couple tubes of the Spicer synthetic grease. Best price I could find was from here:
https://www.truckid.com/spicer/driv...um=order&utm_campaign=order_notification_mail
I know it's not necessary to use their stuff, but I'm kind of curious how good this stuff is considering the price tag. I think the extra $$ is for it's ability to pump itself into the zerk.

I was going to use some Valvoline VV985 I have laying around here in a couple different guns, but from techinfo.toyota.com it isn't stating a moly additive type grease. (Although I really can't see how it can affect something that only oscillates back and forth). I think I just wanted an excuse to buy another lincoln grease gun just for lithium only grease. I'm sure the wife will be tickled I've ordered yet another tool. :whacky: