FYI Grease fitting on double u joint

[ironworker40]

There is a grease fitting on some of the double u joint center ball. It is very hard to see and you need a needle grease gun adapter to grease is. Don't overlook this step while greasing you truck or you will have to replace it and possible the yoke welded onto the driveshaft.

 

[chris142]

Is it on the OE part or just the aftermarket ones?

 

[ironworker40]

I have seen it both ways on the oe part so you have to look to verify. Its hard to get to with skid plate and crossmember in the way

 

[jim_22]

Hmm... there are 3 knuckles on my drive shaft. Only two have zercs, I always wondered why but I certainly don't have anything that looks like this.

 

[Black dawg]

And it takes quite a bit of grease to actually get the needles greased in the centering ball

 

[ironworker40]

Hmm... there are 3 knuckles on my drive shaft. Only two have zercs, I always wondered why but I certainly don't have anything that looks like this.

I am talking about the front drive shaft with double u joint at transfer case on a f-350. Fitting is in the center behind the u joint closest to transfer case. You 250 should have a single u joint.

 

[ironworker40]

I found out some more information that I will pass on. Spicer makes a non-greasable version of the center yoke with a outer seal. Definitely a better set up because there is no way to grease this with driveshaft in the truck. This is the style that is on my buddies 2010 f-250 superduty.
The problem is that my driveshaft shop told me that the seal does not work with the greasable style weld yoke so a new yoke would have to be welded to your drive shaft to use the non greasable version with the seal.