Drive/Prop Shaft Greasing Guide

No success. I was able to remove the zerk from the u-joint itself and figured out that if I install a 90 degree zerk then I can get my grease gun on there and get it filled. Problem is, I can’t find the right 90 degree zerk with the right diameter and thread pitch anywhere locally. Anyone have places they recommend?

Ace hardware is where I’d check first.
 
No success. I was able to remove the zerk from the u-joint itself and figured out that if I install a 90 degree zerk then I can get my grease gun on there and get it filled. Problem is, I can’t find the right 90 degree zerk with the right diameter and thread pitch anywhere locally. Anyone have places they recommend?
I bought from this place before:Grease Zerks
 
I bought from this place before:Grease Zerks

Thank you! Since there’s a $15 minimum for orders, I’m working on trying to find other items I may need in the future, just not sure what I can get for cheap. I’m buying a 6MM & an 8MM 90 degree zerk since I’m not sure what it’ll accept. But I pray that all goes well.

Edit: I ended up just buying multiple 90 degree zerks, two 6MM and two 8MM, in case I need anymore for the future
 
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Thank you! Since there’s a $15 minimum for orders, I’m working on trying to find other items I may need in the future, just not sure what I can get for cheap. I’m buying a 6MM & an 8MM 90 degree zerk since I’m not sure what it’ll accept. But I pray that all goes well.

Edit: I ended up just buying multiple 90 degree zerks, two 6MM and two 8MM, in case I need anymore for the future

Should've thought of this earlier. I'm sure I have a spare one I could toss in an envelope for you. Let me know.
 
Is it a 90 degree fitting?

How bout one of each of these?

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Can I use Moly-Lithium Grease for all points since I have it? I'm sure it would be better than no grease for 10 years.
 
Change in grease recommendation

Weird that as per the TSB, Toyota's most recent recommendation is to use MP grease on all joints except for the double cardan which is moly. Isn't a double cardan joint just two U-joints? How is it different in construction vs a U-joint to require (in theory) a different grease?

It seems the reason why Toyota initially specified two greases is because of the presence of sliding vs rolling forces. Rolling forces are better serviced by a (NLGI GC rated) MP grease and sliding forces by a (NLGI LB rated) moly grease. However, these days greases have become so good that most moly and MP greases are both GC and LB rated, so it might not really matter. All the old school guys saying moly greases ruined their U-joints were probably basing their experiences on ancient greases which did not perform the same in these two applications as compared to a modern grease.

I'm curious why Toyota would switch from a moly to a MP grease for the slip yoke when sliding forces are better serviced by a moly grease.



I spent a while researching this as well because I have both a '99 and 2019 t4R, both 4x4. I was hoping the advice on the 2019 would be retroactive to the 1999 for some reason. I called a couple different entities but finally got the answer as to why the 5th gen recommendation was different from the 3rd gen. The guy at the Toyota Service Center told me Toyota uses a different metal compound in the 5th gen driveshafts. So those of you with the 5th gens don't NEED a moly lube but it's still recommended.

As for me, I'm going to have two guns, one with moly and one without. I honestly don't know why I spent so much effort trying to convince myself it's okay to use one grease on everything. An extra grease gun loaded with moly will cost me about $30 and will probably last the life of both cars. Trying to find a reason to use only one grease made me feel cheap and lazy. Having two guns will make me feel like a pro. And I kinda like that.
 
Decided to finally go grab a grease gun and hit up all my grease points today on the 98 I bought a month ago. Some of them it would appear haven't been hit in ages (I remember us hitting them when I changed oil but I wonder how many lube techs ever see them anymore with all the non-servicable stuff these days). My only problem was I got a gun with a flexible tube and the twist lock to hang on the the zirk fitting. The issue I'm having is that this style isn't allowing me to hit the zirks on the single u joints on the front driveshaft at the tcase and the rear driveshaft at the dif. I can get the gun on it but can't tighten it and so the grease just flows out of the nozzle instead of into the fitting. What nozzle do I need to find to hit these?
 
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The nozzle my Lincoln grease gun's hose came with can be either twist-locked OR simply pushed straight onto the zerk. There's a dull snap when it locks on. You have to give it a good yank to remove it, which sometimes causes your knuckles to bash into some nearby sharp metal.
 
anyone know what size zirk i need for the #8 zirk in the diagram on pg1? mine appears to be missing. thank you!

It’s an M6x1 grease fitting. You can usually find the little packs of assorted metric grease fittings at your local auto parts for for just a few bucks.
 
anyone know what size zirk i need for the #8 zirk in the diagram on pg1? mine appears to be missing. thank you!

I have a crapload of these (not OEM but vintage and high quality). I can mail you a couple if you want, just PM me.
 

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