best birfield grease

[retrofive]

Yup, that be it. Got me a grease gun and wrote "moly" on it with a black sharpie pen so I don't get mixed up. Simple things for simple minds.

Not that I don't trust you central oregon boyz but you guys are happy running this stuff? I could search more around town or order (not in a hurry), but Napa is 1/4 mile from my home, have it stock, done. Seeing this is only a top-off as well any issues with it mixing with god knows what is in there now.

 

[Russ in California]

80t0ylc - Is this the stuff you are referring to from napa? : Product Information -- SL3330 -- Moly-Graph® Extreme Pressure Multi-Purpose Lithium Grease, 14 Wt Oz
Just started my search to pick some up to "top-off" mine.
Any other thoughts from you guys on this stuff?

That's the Molly. Good stuff there Maynard
Used that on all my birf jobs. Like I'm an expert even though I could probably do it blind folded now. Not sure if that's a good thing or not.

 

[80t0ylc]

Not that I don't trust you central oregon boyz but you guys are happy running this stuff? I could search more around town or order (not in a hurry), but Napa is 1/4 mile from my home, have it stock, done. Seeing this is only a top-off as well any issues with it mixing with god knows what is in there now.

I got it to do just what you're going to do - top off. Went over to another Cruiserhead's to help on some of his rigs only to find out that him and his roomate use this stuff on all their rigs. About 6 altogether, 40s through 80s.

If there's any big concerns about compatibility, the only way to be sure is to do the axle service and start from scratch. Don't know what this stuff wouldn't mix with, though (Except maybe water). You should be ok just to top off till your next axle service.

 

[retrofive]

That's the Molly. Good stuff there Maynard
Used that on all my birf jobs. Like I'm an expert even though I could probably do it blind folded now. Not sure if that's a good thing or not.

I got it to do just what you're going to do - top off. Went over to another Cruiserhead's to help on some of his rigs only to find out that him and his roomate use this stuff on all their rigs. About 6 altogether, 40s through 80s.

If there's any big concerns about compatibility, the only way to be sure is to do the axle service and start from scratch. Don't know what this stuff wouldn't mix with, though. You should be ok just to top off till your next axle service.

Thanks Guys

 

[Tools R Us]

Moly grease is water repellent. Most other grease is lithium fortified and it tends to absorb water. You hope that you never get water in your knuckle, but if it does...

Nope, moly is an extreme pressure additive. Most all automotive greases are now lithium based, so they will mix with other lubes. In the past there were some (like sodium base) that would break down when mixed with other lubes, causing a quick loss of lubrication protection.

 

[cybrstar]

square valve behind the rotor,

What is the square valve?

But when I changed out the grease in the Birf's I used the stuff that they sell at autozone for $2.99 a bucket. Any type of MOLY grease. There are many greases out there.

 

[rhyary]

What is the square valve?

But when I changed out the grease in the Birf's I used the stuff that they sell at autozone for $2.99 a bucket. Any type of MOLY grease. There are many greases out there.

Cybrstar - the $2.99 is for Jeeps.

 

[80t0ylc]

What is the square valve?.............

He meant: Plug with a square head.

 

[cybrstar]

I'm sorry that the MOLY grease that I bought from autozone is only for JEEPs RHY!

But it was the only MOLY grease that I could find..... I took the first grease, as you know that there are a bazzilllion out there, that said MOLY GREASE in the front of the bucket...

I tried pickin up a couple of buckets and read the "special ingredients"........ but majority of them were some sort of different blends of greases/oils. I didn't know if those were good for the BIRFS or not.

So call me Plain Jane. I hope Moly is Moly........I hope

Ohh yeah, don't mean to Jack the thread...

But with the refill plug located on the top of the Knuckle Housing, how would you go apon refilling it back up with grease.

How long before do you need to refill them? Do you just shoot some grease in there till it's full? How do you refill it, with a grease gun?

 

[rhyary]

Yes with a grease gun.
As you turn the wheel, the grease gets wiped on the birfs ball and keep them lubricated. When that shows signs of rust, you know no grease left. You want to refill before that happens.

Some have suggested a great way to check the amount. Dip a zip tie thru the hole and fill up 3/4. so no, not until full.

It depends on the condition of you axle wipes. If they are new, they will allow for a small layer to get smeared. If they are older, they might allow more grease to come out and you will have to refill more frequently. I think it should last at least a year.

PS. When I did the axle job last October, I was reading grease lables as well. So I know the feelings of standing in the grease isle being confused by all the types. It was MY first encounter with grease types, and I am not by any mean an expert.

 

[bwr9300]

any body got pics of the square to remove? I think a pic of the square to remove might help those newbies (like me) filling their birfields. IIRC, there were two similar, squarish heads near each other down there.

 

[Tools R Us]

any body got pics of the square to remove? I think a pic of the square to remove might help those newbies (like me) filling their birfields. IIRC, there were two similar, squarish heads near each other down there.

Not the plug, it's out on the floor. With the steering turned like this you get a pretty good look into the knuckle through the hole.

 

[retrofive]

Thanks for the pic Tools

Just picked up some of the STA CRC SL3330 from Napa today. Woohoo.

 

[93Chewbacca]

https://forum.ih8mud.com/80-series-tech/461197-chewbaccas-birfield-grease-guide.html

 

[mintman1869]

August 2025 Napa Speacial
3-% Moly

https://www.napaonline.com/en/p/VAL70112