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#4682916 - 03/03/18 04:38 AM U-Joint Failure, was it the grease?
zfasts03 Offline


Registered: 07/21/08
Posts: 249
Loc: Bucks, PA
A few years back I had to change the U-Joints on the front axle shafts of my 1997 Dodge Ram 1500 4x4. (Dana 44 axle)

I used:
- Moog Super Strength U-Joints (with zerks)
- Pumped U-Joints full though the zerks with Amsoil Dominator Synthetic Racing Grease (no moly), prior to reinstalling the shafts in the axle

About 3000 miles later the joints failed, binding and getting real hot.

2nd time around I used Spicer U-joints (no zerks) and all is good for years now.

Upon disassembly of the failed Moog joints the roller bearings/grease had fused themselves as one. There was no longer any roller action of the bearings and major friction and heat was happening.

So since then I am hesitant in using Amsoil Racing grease.

Did I do something wrong with installation? Or are the Moog joints not good for this application? The Moog joints seemed to install fine and movement was good without binding when reinstalled.




Edited by zfasts03 (03/03/18 04:39 AM)
_________________________
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#4682929 - 03/03/18 05:44 AM Re: U-Joint Failure, was it the grease? [Re: zfasts03]
MParr Offline


Registered: 10/28/17
Posts: 473
Loc: Georgia
Could have been the grease. A NGLI#2 lithium type grease is normal for the application. The Spicer joints cost a little bit more than the Moog and there may be a reason for that. There are several brands of grease that meet the NGLI#2 specs that work well in u-joints and wheel bearings. Valvoline Durablend Synthetic Blend Grease is the one I keep around.
https://www.valvoline.com/our-products/grease-gear-oil/synthetic-blend-grease
Mobile One is another good choice
https://mobiloil.com/en/synthetic-grease/mobil-1-synthetic-grease
_________________________
2013 KIA Optima EX 2.4L. Now: Castrol Magnatec GTX 5W30 synthetic &OE filter
2017 Ford Escape SE 2.0T Now: Valvoline Advanced Synthetic 5W30 & WIX 51348

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#4682932 - 03/03/18 05:48 AM Re: U-Joint Failure, was it the grease? [Re: zfasts03]
jakewells Offline


Registered: 12/28/12
Posts: 378
Loc: Cave City KY
I use moly ep grease in my u-joints never had a failure except on the non greasable bearings.


Edited by jakewells (03/03/18 05:49 AM)
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#4682937 - 03/03/18 06:11 AM Re: U-Joint Failure, was it the grease? [Re: zfasts03]
Shannow Online   content


Registered: 12/12/02
Posts: 39425
Loc: 'Stralia
Too many variables to say either way.

If the zerks were in the centre of the crucifix, then the centre section would have been beefed up to handle the extra equipment and porting...my in and of itself have been binding.

You changed two things

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#4682943 - 03/03/18 06:17 AM Re: U-Joint Failure, was it the grease? [Re: zfasts03]
Trav Offline


Registered: 11/20/06
Posts: 18561
Loc: MA, Mittelfranken.de
So many variables. Moog is not a manufacturer of U Joints, hub bearings, etc they source much of that line from China so God know what you actually got. Poor quality part, lube fail, buggered installation, take your pick your guess is as good as mine.
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#4682949 - 03/03/18 06:36 AM Re: U-Joint Failure, was it the grease? [Re: zfasts03]
danez_yoda Offline


Registered: 07/18/09
Posts: 444
Loc: texas
I replaced failed spicer non zerk ujoints on my 07 tacoma a few years ago. I put moog zerk ones with the zerk on one of the caps instead of the cross. These zerks are smaller than standard and a pita (you need a special tip to greas them) but they have been good. I grease them every 5k with grean grease NLG2. Nothing special about this grease, it was i picked up for my boat trailer bearings. It seem s to work fine for ujoints. Probably 20k miles on them.

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#4682955 - 03/03/18 06:43 AM Re: U-Joint Failure, was it the grease? [Re: zfasts03]
dlundblad Offline


Registered: 09/30/13
Posts: 9838
Loc: Indiana
Hard to blame any sort of grease on a failure in 3000 miles unless you used JB Weld. laugh

I blame junk parts.
_________________________
03 Jeep WJ 4.0 197k Castrol Edge 10w40 HM Fram XG16
02 Volvo S60 2.4T 170k M1 0w40 Mann HU819X
97 Chevy Blazer 4.3 142k Rotella T5 10w30 Fram TG3980


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#4682976 - 03/03/18 07:21 AM Re: U-Joint Failure, was it the grease? [Re: zfasts03]
Kestas Offline



Registered: 06/04/02
Posts: 12273
Loc: The Motor City
It sounds like the grease in your failed u-joint lost its oil and left only thickener. U-joints actually need a lighter grease like Grade 1.5, so it can flow back under the needles during information.

There is a good grease for this application. It is Kluberplex BEM 34-132. It is calcium based to resist washout, good for 2000 hours at elevated temperatures, and the product data sheet mentions it is good for micromotion applications.

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#4683000 - 03/03/18 08:04 AM Re: U-Joint Failure, was it the grease? [Re: zfasts03]
JHZR2 Offline



Registered: 12/14/02
Posts: 41655
Loc: New Jersey
Thinking out loud - if they were "pumped full", could these be too full, sort of like electric motors, where too much can be far worse than too little?

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#4683001 - 03/03/18 08:07 AM Re: U-Joint Failure, was it the grease? [Re: zfasts03]
spasm3 Offline


Registered: 05/30/10
Posts: 8533
Loc: North Carolina
I think almost any grease would have made it 3000 miles. I probably would have regreased about the time they failed. I just think poor quality parts.
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#4683030 - 03/03/18 08:43 AM Re: U-Joint Failure, was it the grease? [Re: zfasts03]
Chris142 Offline


Registered: 06/05/03
Posts: 16682
Loc: Deplorable in apple valley, ca
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#4683129 - 03/03/18 10:49 AM Re: U-Joint Failure, was it the grease? [Re: danez_yoda]
Linctex Offline


Registered: 12/31/16
Posts: 5954
Loc: Waco, TX
Originally Posted By: danez_yoda
I put moog zerk ones with the zerk on one of the caps instead of the cross. These zerks are smaller than standard and a pita (you need a special tip to greas them) but they have been good.


It's the same "pointed tip" grease gun used to grease the tip sprocket on a chainsaw bar
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#4683189 - 03/03/18 12:19 PM Re: U-Joint Failure, was it the grease? [Re: zfasts03]
Yah-Tah-Hey Offline


Registered: 05/26/14
Posts: 3312
Loc: Columbus,Nebraska
Poorly made product.

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#4683241 - 03/03/18 01:49 PM Re: U-Joint Failure, was it the grease? [Re: zfasts03]
Pajero Offline


Registered: 05/05/12
Posts: 808
Loc: Rio Rancho, NM
Definitely equipment failure, not grease. I don't use aftermarket parts for that reason. But, OEM are becoming obsolete for my application.

Schaeffer's makes an outstanding grease! I've heard good things about Amsoil too!



Respectfully,

Pajero!
_________________________
Always remember "Planned obsolescence."

1994 Montero SR 3.5 DOHC, 128,xxx
Fram Ultra/ Snorkel with Pre-filter
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#4683477 - 03/03/18 06:25 PM Re: U-Joint Failure, was it the grease? [Re: JHZR2]
bchannell Offline


Registered: 01/09/08
Posts: 365
Loc: WV
Originally Posted By: JHZR2
Thinking out loud - if they were "pumped full", could these be too full, sort of like electric motors, where too much can be far worse than too little?


According to Spicer and other U joint manufacturers, there is no such thing as 'too much grease'. They recommend pumping them full and pushing grease out of the lip every time you lube. I'll try to find the paper on it and post a link. Ran into this when replacing some joints on my truck.

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