To much grease in the driveshaft?

schneidermj · Jun 27, 2005

I was greasing the front driveshaft yesterday and grease started to come out of the driveshaft (not the zerk fitting). After doing some driving today I noticed more grease (minimal amount) coming out at the same spot. Is this normal or did I blow a seal?

schneidermj · Jun 27, 2005

Anyone?

Kanab · Jun 27, 2005

No problem, I use to grease my LC and I would fill until it came out the joints. Any excess will work its way out as you drive and get all over the bottom of your truck

You didn't hurt a thing. I have the dealer do the grease jobs on my 4runner and will have to do it myself in the future since they never grease them all. The last time they could only find 2 of the 6 zerts

How many zerts did you grease on your AWD?

schneidermj · Jun 27, 2005

pitbull-The U joints are lubed until I see grease coming out of the joints, but the drive shaft is what is in question here. I'm thinking I may have blown a seal???

I have the V6 which has 3 zerks per drive shaft. I've been doing all the maintenance myself as I tend to educate the yota mechanics when I bring it in for something. They make me nervous as hell...

Kanab · Jun 27, 2005

schneidermj said:
pitbull-The U joints are lubed until I see grease coming out of the joints, but the drive shaft is what is in question here. I'm thinking I may have blown a seal???

I have the V6 which has 3 zerks per drive shaft. I've been doing all the maintenance myself as I tend to educate the yota mechanics when I bring it in for something. They make me nervous as hell...

I don't think you hurt anything.

<<<< · Jun 28, 2005

There is a small clearance between lubed parts, thus greasing required. If there was a perfect seal, no re-lube would be needed ala CV joints. So if some extra NaGL comes out it's just getting its job done. The only damage done is some splaters underside.

schneidermj · Jun 28, 2005

Thanks to all who responded.

MicaBlue03 · Jun 29, 2005

There has been some previous discussion on this topic; you might search for driveshaft and propeller shaft.

I don't think we came to a certain conclusion, and there were some folks who worried that filling the slip joints on the shafts (as opposed to the spiders in the hooke joints) could blow out the grease seals or place excessive end loads on the differentials or transfer case during compression of the shaft caused by going over bumps.

For myself, I concluded that this was unlikely to be a problem, and that the joints would probably have to have a way to get rid of excess grease. Even if you only add the slightest bit of grease you will eventually fill the slip joints anyway, as they really can't "consume" much grease. More likely, as others have speculated, that the joints will simply spit out the excess and the worst problem you will have is grease splatter.

To much grease in the driveshaft?

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