Ok, I''m gonna keep it simple, and I think this will help a lot of others as well.

What lasts the longest and is the best grease for greasing the slip yoke and getting rid of the dreaded clunk. Anti-seize, moly grease, or just a multipurpose grease?

Any details are nice as well.

 

not grease my friend

use anti-seize and be VERY liberal.

I used grease the first time, only lasted 6 months, then i used anti-seize, has been 3 plus years and still strong.

 

multipurpose grease has been working fine for me and everyone else for decades... Don't forget to seal the boot again.

 

I'm leaning towards anti-seize, but I can't find a steady supply of people who agree. It's always mixed answers between the 3 I listed. I just want to get whatever will work best the first time!

Plus I keep hearing that anti-seize isn't technically for that application.

 

Generally you want a grease that's labeled as NLGI.

I use the Red "N" Tacky #2 grease, made by Lucas. It's a NLGI, GC-LB, grease. The label says its "fortified with "Anti-Seize", if you want to get a nut on that.

 

Grease is cheaper than anti seize, you may want to try that and if the clunking comes back after a while switch to something else. Just pack it whatever you in in there real good. I used a brush to get the grease in the splines, etc. When I put my driveshaft back together it was hard to put the slip yoke back on the transfer case, the grease was sealing well enough that air pressure built up... I used NGLI #2 grease that I had in a 1 pound tub on the shelf because it was convenient. Costs a few dollars at Wal Mart, Farm and Ranch, or Auto parts stores. You can use the same stuff you use to grease the suspension or front driveshaft.

 

My local diff/driveline shop recommended the GM 12345879 Lubricant that was what a GM service bulletin said to use for driveshaft slip yokes. He's been working out of this can for almost 20 years and says it works better and for longer than anything else he's tried over the years.

 

Grease works in bearing systems for YEARS, it should be fine. Anti seize would probably work too but won't slide as well. Seizing is slightly different purposes, if I've read correctly.