Greasing front drive shaft? - Dodge Cummins Diesel Forum
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post #1 of 83 (permalink) Old 09-11-2019, 03:35 PM Thread Starter
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Greasing front drive shaft?

I've watched several You Tube videos on how to grease the front drive shaft. None of them are on a 2019 model. It would appear that the u-joint has changed from previous years. The new joint no longer looks like a conventional u-joint. The owners manual still calls for you to lube it at each oil change, but I am at a loss of how or where to lube it. I do not see any serviceable fittings. Have any of you serviced this joint? Help! There is a conventional looking u-joint on the end connecting to the front differential, but it is not serviceable. The joint on the end connecting to the transfer case is the one in question.


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post #2 of 83 (permalink) Old 09-11-2019, 03:46 PM
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I'll take a look at mine when I get home, but I'm sure it's the same double-cardan joint that's been used for ages at the transfer case end. The intent is to grease the ball and cup portion of the cardan joint. The factory u-joints are typically sealed non-greasable joints.
You have to use a needle nozzle on your grease gun because a conventional zerk fitting won't clear the yokes/u-joints.

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post #3 of 83 (permalink) Old 09-11-2019, 04:41 PM Thread Starter
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Please do take a look. The joint is round and shielded. There are no knuckles. I've seen the needle fittings on other u-joints and this one doesn't appear to have any. Everything is smooth and rounded.

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post #4 of 83 (permalink) Old 09-11-2019, 05:11 PM
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I uploaded the pages from the service manual for lubricating the front drive line. It isn't any different than any other I have experienced since my 1977 Dodge Powerwagon. I will get back home Friday night from this work trip and physically look at my truck, but this is all I can give you right now.
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File Type: pdf Front drive shaft.pdf (64.4 KB, 135 views)
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post #5 of 83 (permalink) Old 09-11-2019, 05:35 PM
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Starting in 2014 the Rams come with CAD front axles which means your driveshaft isnt spinning at road speed while in 2wd... There's no reason to grease them very often, it at all, unless you're using 4wd all the time.

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post #6 of 83 (permalink) Old 09-11-2019, 05:57 PM Thread Starter
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Originally Posted by ZRojas View Post
I uploaded the pages from the service manual for lubricating the front drive line. It isn't any different than any other I have experienced since my 1977 Dodge Powerwagon. I will get back home Friday night from this work trip and physically look at my truck, but this is all I can give you right now.
My 2019 does not have a double-cardan joint on the rear of the front drive shaft. It looks completely different.

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post #7 of 83 (permalink) Old 09-11-2019, 05:58 PM
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Originally Posted by KATOOM View Post
Starting in 2014 the Rams come with CAD front axles which means your driveshaft isnt spinning at road speed while in 2wd... There's no reason to grease them very often, it at all, unless you're using 4wd all the time.
At oil changes. Still spins out grease, at least its not dry.

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post #8 of 83 (permalink) Old 09-11-2019, 06:04 PM
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At oil changes. Still spins out grease, at least its not dry.
There's no way for the grease to physically spin out. Especially since its not spinning while in 2wd. If spinning forces caused u-joints to run dry then they wouldnt last a day.
The only reason to add grease to u-joint caps is to push out any contaminants...if any. This is why non-greaseable u-joints are far superior to greaseable.

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post #9 of 83 (permalink) Old 09-11-2019, 06:16 PM
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Leave a blob on the inlet when the needle pulls out it will.

Me being lazy i guess.

Am finding that greasing at every oil change may be overkill...

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post #10 of 83 (permalink) Old 09-11-2019, 06:23 PM
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The grease is for the ball and socket not the u joint. Curious if they actually changed the design for the 19s although most dealers say there has never been a grease point on the driveshaft.
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post #11 of 83 (permalink) Old 09-11-2019, 06:49 PM
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Originally Posted by the man in black View Post
The grease is for the ball and socket not the u joint. Curious if they actually changed the design for the 19s although most dealers say there has never been a grease point on the driveshaft.
You made me go out and look. After a quick glance (it's raining), yes, it's not a typical CV-joint like on the earlier models.
Hard to tell since it's enclosed, but could be an Rzeppa style.
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post #12 of 83 (permalink) Old 09-11-2019, 07:12 PM
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Originally Posted by Jimmy N. View Post
You made me go out and look. After a quick glance (it's raining), yes, it's not a typical CV-joint like on the earlier models.
Hard to tell since it's enclosed, but could be an Rzeppa style.
I'm surprised of all people, you dont know the answer on whether it needs greased or not. Slacker
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