Change U-joints proactively in '76?
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Joined: Jul 2011
Posts: 56
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Change U-joints proactively in '76?
Hello,
I'm in the process of rebuilding the suspension in my '76. The car has around 85k original miles. As far as I know, the U-joints don't need to be replaced, however, I'm wondering if I should go ahead and tackle this while I have the exhaust removed and am replacing the leaf spring, shocks and strut rods. Obviously budget is a concern so I hate spending money on "repairs" for parts that are not yet broken. But I also will kick myself if a U-joint fails in 6 months and I have to tear everything apart again. Additionally, the half shafts are pretty rusted and ugly looking. If I decide to tackle this job now, should these be painted or powder coated? If painted, what's the best type of paint to use and how should I prep the half shafts so the paint does not chip or flake? Lastly, everyone seems to recommend Spicer U-joints. Can these be purchased locally at an auto parts store, or do I need to special order? Or, can I purchase standard OEM U-joints at the local Autozone, etc.
As always, I greatly appreciate everyone's feedback/advice.
I'm in the process of rebuilding the suspension in my '76. The car has around 85k original miles. As far as I know, the U-joints don't need to be replaced, however, I'm wondering if I should go ahead and tackle this while I have the exhaust removed and am replacing the leaf spring, shocks and strut rods. Obviously budget is a concern so I hate spending money on "repairs" for parts that are not yet broken. But I also will kick myself if a U-joint fails in 6 months and I have to tear everything apart again. Additionally, the half shafts are pretty rusted and ugly looking. If I decide to tackle this job now, should these be painted or powder coated? If painted, what's the best type of paint to use and how should I prep the half shafts so the paint does not chip or flake? Lastly, everyone seems to recommend Spicer U-joints. Can these be purchased locally at an auto parts store, or do I need to special order? Or, can I purchase standard OEM U-joints at the local Autozone, etc.
As always, I greatly appreciate everyone's feedback/advice.
Melting Slicks
Joined: Apr 2002
Posts: 2,337
Likes: 14
From: Norfolk VA
Sounds like you have caught the while im at it disease. If you feel uncomfortable with the condition of the suspension parts then replace them. Spices u joints are durable and can be ordered from any auto parts store (not sure if some stores stock them) As for prepping/painting parts others will offer input.
Drifting
Joined: Apr 2007
Posts: 1,970
Likes: 45
From: Cameron Park CA
As Oldguard says, if you feel more comfortable replacing the u-joints now do so. OTOH, I have had my driveshaft and halfshafts out without removing anything else, so if your u-joints are still serviceable, there is no reason to replace them now.
Pete
Pete
Melting Slicks
Joined: Mar 2007
Posts: 2,520
Likes: 11
From: Hinckley OH
Unless you have too much money.
Melting Slicks
Joined: Nov 2003
Posts: 2,362
Likes: 1
From: San Antonio TX
It seems to me as if you have doubt in your mind as to the What If thing. So if it makes you feel better replace them with some Spicer U joints without the Zerk Fittings.
As for Paint it is up to you and your pocket book. Krylon can be done at home and is pretty cheap.
As for Paint it is up to you and your pocket book. Krylon can be done at home and is pretty cheap.
Drifting
Joined: Apr 2006
Posts: 1,911
Likes: 2
From: gold coast queensland
For a stock to moderate hp car i actually prefer the u-joints with the grease fitting. If your not doing drag runs or regular burn outs they wont break. Once every 6 months give them a couple of pumps with a grease gun until you hear the first sign of grease cracking the seal and they will last years. The solid ones are great for strength in higher HP applications but once they run dry they are toast.
If i was you i would at least take the time to remove the half shafts, clean them up and inspect your u-joints. That is free !! you will know when you remove the caps if they can take some grease and be re-usable.
If i was you i would at least take the time to remove the half shafts, clean them up and inspect your u-joints. That is free !! you will know when you remove the caps if they can take some grease and be re-usable.
Burning Brakes
Joined: Oct 2001
Posts: 1,241
Likes: 4
From: Okinawa Okinawa
Would you rather replace a U joint now or wait for it to fail and hope nothing else like a driveshaft or half shaft breaks in the process? My .02 cents is to replace while everything is already out. I would personally go w/ a solid ujoint w/ no zerk.
Melting Slicks
Joined: Sep 2004
Posts: 2,655
Likes: 19
a serviced U joint will probably outlast most of the car. But they are old and not very expensive, so I changed all of mine while I had things apart. They usually give an indication of when they're going bad (clunk). But if you're on the the road, the cost for a mechanic to replace 1 would be more than the cost for you to replace all of them now.
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Drifting
Joined: Mar 2011
Posts: 1,886
Likes: 9
The outer U joints on the half shafts are typically the first to go, as they see more dirt and water. The inner U joints and the driveshaft U joints are more protected, and often last longer. They usually will clunk and squeak a while before anything drastic happens. Unless you drive the car very aggressively. If you like to leave black streaks on the road, replace them now. Otherwise, let it go for the time being.