Zerk Fitting on Driveshaft
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Senior User
Joined: Jan 2004
Posts: 205
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From: Houston, TX
Zerk Fitting on Driveshaft
I've got a bad case of the classic driveline "clunk" and think I need to lube the splines on the shaft.
I've read some of the posts on installing a zerk fitting.
Anyone successfully install a zerk on the female end of the shaft? I'm nervous that I'll gore the splines drilling the hole and the thing will never mate up again.
I've read some of the posts on installing a zerk fitting.
Anyone successfully install a zerk on the female end of the shaft? I'm nervous that I'll gore the splines drilling the hole and the thing will never mate up again.
Fleet Owner
Joined: Jun 2004
Posts: 25,090
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From: Rio Rico, AZ.
I have not, but would like to hear this thread as well.
Just thinking about it, I don't see where it would be a problem. Use a new drill, lot's of oil to lubricate it, and only use very gentle pressure and it won't blow out the bottom of the hole when it emerges. Tap cut the threads, install Zerk, done.
Just thinking about it, I don't see where it would be a problem. Use a new drill, lot's of oil to lubricate it, and only use very gentle pressure and it won't blow out the bottom of the hole when it emerges. Tap cut the threads, install Zerk, done.
Tuned
Joined: Oct 2003
Posts: 390
Likes: 0
From: Maine
I don't know how thick the metal on the shaft is, but if there is room, just penetrate the shaft with a 1/16" or so bit, then drill and tap for the fitting, but don't drill all the way through. the small hole will allow the grease through, but wont blow through with debris, and may allow the shaft to be stronger. Whatever method you use, post back and let us know!
Elder User
Joined: Jan 2004
Posts: 803
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From: Bobcaygeon Ont.
I've done it. Take the drive shaft out and seperate the two have's. Than drill the female side of the shaft. Clean the shavings out and than put them back together being sure to pre-lube them. Than when you do you do your lube,oil and filter you can pump some into the drive shaft. I did this on a lifted 79 Bronco i had. Worked great!!
Posting Guru
Joined: May 2006
Posts: 2,274
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From: Milroy, PA
Dont forget! If you still have your dust boot, to make a small vent hole, for air to escape, otherwise when you pump in grease, theres no way for the air to leave, and it will actually make your driveshaft vibrate a little more, then one day, splat, grease flies....... ask me how i know
Elder User
Joined: Jun 2006
Posts: 613
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From: Connecticut
Just a shot in the dark here,but if you pump to much grease in there.Wont it create a vacuum and/or pressure on the tranny? Could be bad for the tranny seals.
I'm just guessing here,as I'm no mechanic by any means.
Just a thought.
I'm just guessing here,as I'm no mechanic by any means.
Just a thought.
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Posting Guru
Joined: May 2006
Posts: 2,274
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From: Milroy, PA
Originally Posted by Green_Dually
Just a shot in the dark here,but if you pump to much grease in there.Wont it create a vacuum and/or pressure on the tranny? Could be bad for the tranny seals.
I'm just guessing here,as I'm no mechanic by any means.
Just a thought.
I'm just guessing here,as I'm no mechanic by any means.
Just a thought.
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Senior User
Joined: Aug 2006
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From: ABQ, NM
I was thinken the same thing. If the spleins are a snug fit (male to female) the grease could act like water on top of a piston. Drive shaft can not easily move in the slip fit. I guess depending on the angle of the drive shaft,(amount of lift on truck) movement is minimal. ??????? and how much room their is inside the cavityfor grease to move around. Has anyone measured the depth of the female side of the slip. Is there enough air in there to compress and expant with the range of motion? It will take some pressure to move the grease through the spleines.
Last edited by tumbleweed2; Nov 28, 2006 at 08:41 PM.
Posting Guru
Joined: May 2006
Posts: 2,274
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From: Milroy, PA
Originally Posted by tumbleweed2
I was thinken the same thing. If the spleins are a snug fit (male to female) the grease could act like water on top of a piston. Drive shaft can not easily move in the slip fit. I guess depending on the angle of the drive shaft,(amount of lift on truck) movement is minimal. ??????? and how much room their is inside the cavityfor grease to move around.
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