Grease wheel bearings through ABS hole - Dodge Cummins Diesel Forum
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View Poll Results: Grease sealed bearings through ABS hole
Do it 17 58.62%
Don't do it 12 41.38%
Voters: 29. You may not vote on this poll

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post #1 of 92 (permalink) Old 11-28-2019, 01:48 PM Thread Starter
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Question Grease wheel bearings through ABS hole

Gonna try this out on my sealed unit and see how it goes, seems like it is better than doing nothing given all I've read on the forums/websites/youtube. That said, what type of grease are you guys using to do this? The grease looks green in color from the limited pictures I have seen and that color is consistent with Ram's recommendation to use Mopar's multi-purpose grease PN - 05083150AA. The sticker under the hood suggests that this grease is lithium-based. Are you guys going with the MOPAR grease or other brands/types of grease? Not sure about compatibility when using other types/brands of grease as well and was hoping to get feedback on the above. Any helpful thoughts would be appreciated!!

I may ultimately change things out to a free-spin hub in the future but wanted to do my best to maintain what I have now given the wide range of mileage I've seen on these forums relating to the sealed wheel bearing life/failure.


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post #2 of 92 (permalink) Old 11-28-2019, 02:13 PM
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I'm thinking about doing the same thing after my hubs are a couple of years old. By that time the existing grease will be getting thicker. I always use a good quality brand name NLGI 2 synthetic grease for wheel bearings and everything else and never had any trouble. I will probably use that same general purpose chassis grease and squirt in a little gear lube with it to help thin the mixture. My old Iowa barnyard engineering mind tells me that something would be better than nothing! Craig

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post #3 of 92 (permalink) Old 11-28-2019, 02:41 PM
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Sealed Unit is the first thing you should understand!

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post #4 of 92 (permalink) Old 11-28-2019, 02:45 PM Thread Starter
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Yeah, agree that something is better than nothing. I have a box of LMX "red" grease that I use on my trailer and one tube of MOPAR grease; I think both are lithium based but wasn't sure the two greases were compatible. Hence my initial post.

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post #5 of 92 (permalink) Old 11-28-2019, 02:51 PM Thread Starter
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@URDiesel, I think I understand your point. There has been quite a lot of debate on this issue on this and some pictures and posts have shed light on the actual construction of the sealed unit. It appears the ABS sensor hole is in the center of the two bearings and while sealed on the outside the actual bearing are not sealed on the inside. So while greasing through the ABS hole may not be the same as dismantling, cleaning and repacking the bearings.... getting grease into the chamber is better than nothing as the centrifugal force will likely spread the grease out from the center and towards the bearings on each side of the hub. All of this of course is supposed to increase the wheel bearing life so we can all save some dollars and cents, although I am not sure it will save me any time as the time incurred in greasing this bad boy requires the removal of the tire and possibly the caliper for a bit to get to the sensor hole.

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post #6 of 92 (permalink) Old 11-28-2019, 03:33 PM
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I would be afraid it will cause ABS issues.

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post #7 of 92 (permalink) Old 11-28-2019, 04:02 PM
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I recall reading on TDR and here that lots of guys were getting phenomenal mileage on some of the 3rd GEN trucks by doing as you describe, @choied .

When I replaced the unit bearings in my 2014 3500 DRW, the grease in the new unit bearings (SKF) was blue in color, much like what one sees in front CV axle boot kit.

https://www.cumminsforum.com/forum/2...l#post26758210

Knowing what I know now, I’d have no hesitation periodically greasing the front wheel bearings. I may even look into doing it on my 4500 soon.

Additionally.....the rotors have to come off as the rotors will block the hole.
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Last edited by gsbrockman; 11-28-2019 at 04:04 PM.
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post #8 of 92 (permalink) Old 11-28-2019, 04:44 PM
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Quote:
Originally Posted by gsbrockman View Post
I recall reading on TDR and here that lots of guys were getting phenomenal mileage on some of the 3rd GEN trucks by doing as you describe, @choied .

When I replaced the unit bearings in my 2014 3500 DRW, the grease in the new unit bearings (SKF) was blue in color, much like what one sees in front CV axle boot kit.

https://www.cumminsforum.com/forum/2...l#post26758210

Knowing what I know now, I’d have no hesitation periodically greasing the front wheel bearings. I may even look into doing it on my 4500 soon.

Additionally.....the rotors have to come off as the rotors will block the hole.
In your link you mentioned you would not do it under warranty. Has that opinion changed?

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post #9 of 92 (permalink) Old 11-28-2019, 05:04 PM
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Yes. Since the unit bearings would be under the 3/36, might as well start early, although 75k wouldn’t be too late to start (IMO).

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post #10 of 92 (permalink) Old 11-28-2019, 05:27 PM
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Quote:
Originally Posted by gsbrockman View Post
Yes. Since the unit bearings would be under the 3/36, might as well start early, although 75k wouldn’t be too late to start (IMO).
Would you use the CV grease you mentioned or something else?

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post #11 of 92 (permalink) Old 11-28-2019, 05:59 PM Thread Starter
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Quote:
Originally Posted by URDiesel View Post
I would be afraid it will cause ABS issues.
@URDiesel, I understand your concern. In response to your ABS concerns, my understanding of the ABS tone ring is that a magnetic field is generated between the tone ring and the sensor; and this is how the sensor determines if there is undesirable wheel spin, i.e., to count the number of teeth passing by the sensor once the brake pedal switch has been activated. As such, I am less worried about grease contacting the ring or interfering with the ABS sensor as the magnetic field generated could not be interrupted by grease per se. Just my simple logic, not sure that makes sense to ya. All this is of course bolstered by not one single mention of an untimely wheel bearing failure by those who have practiced this unorthodoxed greasing method, i.e., greasing a sealed bearing....
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post #12 of 92 (permalink) Old 11-28-2019, 06:14 PM
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I must be missing something. The hub assembly is sealed, along with the actual bearings. Where exactly is the grease going?

Are you saying there is a hollow space in the hub between the inner and outer sealed bearings?



In my experience, excess grease collects dust and sand. Turns into an aggressive sandpaper type stuff.
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