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U-joint to differential yoke

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U-joint to differential yoke

  #1  
Old 01-08-2019, 06:17 PM
Tad Wicks
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Default U-joint to differential yoke

I guys, 1999 3500 diesel,I recently posted on here that I had a bad vibration at highway speeds and I found that the u-joint retainers were missing allowing the caps to back out and let the drive line run off center, easy fix. Well the vibration has now returned, so I slid under and checked the drive line again for looseness and found that the rear most ujoint was sliding back and forth in the differential yoke almost unrestricted but held captive by the tabs on the yoke and the straps. So I started measuring and the Tabs on the yoke are 4.250 and the spread on the ujoint is 4.1875 and of course in order to slide back and forth 0.0625 the straps bottom on the yoke before clamping on the cap. I used Moog 295 ujoints that measure 1.1875 and the spread is 4.1875 like they are supposed to be. I checked a 1994 3500 and the yoke measures 4.188 on the money, so obviously there is something amiss. Was a converting ujoint ever used or may be the yoke has been changed to something else??? Anybody run into this?? Thanks Tad
 
  #2  
Old 01-08-2019, 06:59 PM
AtomicDog
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The yoke could certainly have been changed. If so, a conversion U-joint may be required.
 
  #3  
Old 01-08-2019, 08:58 PM
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You are concerned about a difference of 15 TEN thousandths on the spread? Really? U-joints simply aren't that precision of a device. They are supposed to be a bit of a tight fit, and the straps should press the caps into the yoke. If they don't, you either have the wrong straps, or the wrong yoke, or a bit of both. Can you post pics??

And where are the retainers? Are they the C clip style fellers that you put INSIDE yoke? (probably not....) or are they the fellers that you insert into the yoke on top of the caps??
 
  #4  
Old 01-09-2019, 07:46 AM
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One or two piece drive shaft? 4X2 4X4? Cross reference the moog number from the dana one.

https://www.expert.dana.com/expertforms/dek350.aspx
 
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Old 01-09-2019, 11:57 AM
Tad Wicks
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Thanks Hey You, not .0015 but .0625 big difference, they are not that crude, if they were, why even balance a drive line?. The "94" rear yoke is right on at 4.188, the only ujoint that I can find so far that is 4.250 has an 1.627 cap and there is no way that works, so I wonder if it was machined wrong from the get go? at any rate it looks as though I will need a different yoke, seal is leaking anyway. It is a 2wd 2 piece driveline and the retainers are on the outside. Thanks again Tad
 
  #6  
Old 01-09-2019, 12:04 PM
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Originally Posted by Tad Wicks View Post
Thanks Hey You, not .0015 but .0625 big difference, they are not that crude, if they were, why even balance a drive line?. The "94" rear yoke is right on at 4.188, the only ujoint that I can find so far that is 4.250 has an 1.627 cap and there is no way that works, so I wonder if it was machined wrong from the get go? at any rate it looks as though I will need a different yoke, seal is leaking anyway. It is a 2wd 2 piece driveline and the retainers are on the outside. Thanks again Tad
My math skills are failing me.

I don't suppose some local parts store has a yoke sitting on the shelf for your truck, that you could compare yours to? I would like to think that Dodges quality control is better than what you are seeing there......
 
  #7  
Old 01-09-2019, 12:14 PM
Tad Wicks
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I am going to keep looking for a u joint but I have little faith that I am going to find what I need. I think that the yoke that I have is a mistake, a 275K mile mistake I will also look into a new yoke, will let you know
 
  #8  
Old 01-09-2019, 08:52 PM
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3-4-14371-1 Is the dana/spicer part# for the yoke according to the dana breakdown.

https://www.northerndrivetrain.com/p...4-14371-1.html
 
  #9  
Old 01-09-2019, 09:10 PM
Tad Wicks
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Thank you sir I greatly appreciate the info and your efforts Tad
 
  #10  
Old 01-10-2019, 05:16 PM
Tad Wicks
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I figured this would keep me going probably good as new.


No not really, I saw this pic and thought that I would have some fun
 

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