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  #1  
Old 02-11-2011, 01:55 PM
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Drive Shaft U-Joint Is Staked/Crimped In Place, Now What To Do?

While waiting for parts to replace the B2 Piston on my Transmission I decied to pull out the Drive Shaft and inspect the Support and Flex discs.

I found that the U-joint does not Flex smoothly through the full range of motion.
I have been advised that this is due to it wearing in one spot because it does not have to flex much.

When I looked for parts (another Russian EPC type site) I fond no U-joint listed as a part.

After cleaning the Joint more I found that the Bearing Caps are Staked in place instead of using a retaining clip.

Is there any one who has changed this U-Joint and if so where did you get the new U-Joint?

Red Arrows point to a few of the Stakes that retain the Bearing Caps.

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Drive Shaft U-Joint Is Staked/Crimped In Place, Now What To Do?-dsc01085.jpg  
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Old 02-11-2011, 02:28 PM
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I didn't know the answer so I did a quick search and got some bad news:-

Tools and procedure to replace U Joint on Prop Shafts

It seems like they are not really meant to be messed with.

Not that that should stop you of course!

But all the same perhaps it would be wise to sort out a replacement propshaft (crazy I know) before you take it apart?
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Old 02-11-2011, 02:34 PM
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Fairmont? Fairlane? Do a search; it can be done with the right tools (dremmel/grinder/patience/balls of steel), but they are meant to be non-servicable, and replacement of the shaft is the correct way.
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Old 02-11-2011, 03:31 PM
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the driveshaft shop was able to free mine up when they shortened the front. there is still hope to not spend a ton of money
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Old 02-11-2011, 04:00 PM
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From what I was told by my MB indy mechanic, the U-joint is not supposed to flex in a free range of motion and when it is on the car, the drive shaft is almost completely straight and the U-joint does not hardly flex at all.

There are companies which will sell you a completely rebuilt drive shaft, balanced correctly with the support bearing installed but they are not cheap, $350 and up with a core charge. They will even use a U-joint with grease zerks if you wish.
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  #6  
Old 02-11-2011, 04:08 PM
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There are driveshaft/driveline shops that cut off the ends containing the non-replaceable 'U' joint, weld on ends with a clip-retained replaceable joint, then re-balance the shaft. I had it done year ago for my '72 W114 250. Not cheap, but cheaper than a new driveshaft.

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Old 02-11-2011, 04:49 PM
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Have a driveshaft shop change it out if you feel it needs to be done. Driveline Service of Atlanta on Jonesboro Rd is the one I use.
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Old 02-11-2011, 05:50 PM
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Boy, thanks for the fast responses.
I do have a Dremel Type Tool and can grind off the staked areas. It may be worth while if only to re-grease it.

I was most interested to see if someone knew what U-joint to replace it with.

I happened to have kept an the Old Ball Joint I removed from my Diesel Volvo. It appears that the Bearing Caps are the same size. I do not know if the Yoke has the same dimensions or not.

I am off to see if I can find the threads by "Fairmont? Fairlane?".
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Old 02-11-2011, 05:56 PM
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Quote:
Originally Posted by Diesel911 View Post
Boy, thanks for the fast responses.
I do have a Dremel Type Tool and can grind off the staked areas. It may be worth while if only to re-grease it.

I was most interested to see if someone knew what U-joint to replace it with.

I happened to have kept an the Old Ball Joint I removed from my Diesel Volvo. It appears that the Bearing Caps are the same size. I do not know if the Yoke has the same dimensions or not.

I am off to see if I can find the threads by "Fairmont? Fairlane?".
It was a long time ago (maybe 2004 or 2005) someone had a pretty detailed posting about how he used U-joint from a Ford car (I'm thinking early 80's) that was a match. It was a Fairlane or Fairmont. I can't remember which.

Ford Falcon
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Old 02-11-2011, 05:56 PM
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  #11  
Old 02-11-2011, 06:13 PM
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Quote:
Originally Posted by MattBelliveau View Post
Fairmont? Fairlane? Do a search; it can be done with the right tools (dremmel/grinder/patience/balls of steel), but they are meant to be non-servicable, and replacement of the shaft is the correct way.
FryBird said the below in his post:
I am replacing my drive shaft U joint, 300D turbo, W123, I have ground off the stakes, pressed/removed the old joint, now need to find the replacement to install.
I think some one said a one from an old Ford Falcon ?
anybody know the correct application to install ?
it seems to be like a cap width ~ 24mm = ~ 15/16"
and a length of ~ 73mm = ~ 2 & 7/8"

So there is a U-Joint available that will fit. That is valuable to know before I start.
The Cap on mine also appears to be 24mm as does the old one from my Volvo.
This is the thread I found:
http://www.peachparts.com/shopforum/showthread.php?t=124491&highlight=U-joint
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  #12  
Old 02-11-2011, 06:21 PM
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Quote:
Originally Posted by MattBelliveau View Post
It was a long time ago (maybe 2004 or 2005) someone had a pretty detailed posting about how he used U-joint from a Ford car (I'm thinking early 80's) that was a match. It was a Fairlane or Fairmont. I can't remember which.

Ford Falcon
I think I found a thread that gave me enough info that there is a U-joint out there somewhere that I can replace it with.
I will be conservative and knock out one of the Bearing Caps so I can get the dimensions of the Joint.
After that I get to go shopping.
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Old 02-11-2011, 07:00 PM
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So would you re-stake it to keep it in place, or try to retrofit a retaining clip?



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Old 02-11-2011, 08:49 PM
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Originally Posted by DeliveryValve View Post
So would you re-stake it to keep it in place, or try to retrofit a retaining clip?

.
Yes, I will re-stake it but not to the extent the Factory did.(I already have removed 2 of the Bearing Caps.)

I do not see how I could cut a groove for a Retaining Ring. I also would not know how much metal could be removed without disturbing the balance.
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Old 02-11-2011, 10:05 PM
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The thing that you have to get right is "centering" the u-joint. Keep in mind that if you have a driveshaft shop do this job they will center it and balance it.

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