Off Set Ball Joints - Dodge Cummins Diesel Forum
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post #1 of 24 (permalink) Old 09-14-2019, 12:05 PM Thread Starter
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Off Set Ball Joints

Hey guys. What’s the deal with these BJs? I’ve read people do them and it’s no big deal, and I’ve read they should only be needed if the inner C is bent and the BJ is a band aid fix for this. I’m asking because my 06 has an offset on the passenger side from the previous owner. I’d like to put in some EMF BJs in the next couple months, but they don’t make an offset that I’ve seen. Besides I’d rather not have one if I don’t need it. Or if they are only for bent axle housings I’d like to know that and get to fixing or replacing what I need to. Thank in advance.

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post #2 of 24 (permalink) Old 09-14-2019, 05:06 PM
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Have the front end alignment checked and if itís all correct then chances are you need the offset upper ball joint.

Iím in that predicament right now. Mine is 6 to 8 degrees off and I need a .5 degree upper ball joint. The problem is most of your upper end manufacturers donít make offset joints. Moot lists a 1.0 and a 1.5 in their upper end Problem Solver line.

Do you know what degree offset you have? If itís 1.0 or more I donít think you will be able to get away with not using one. If itís a .5 you might not have to use one.

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post #3 of 24 (permalink) Old 09-14-2019, 06:03 PM Thread Starter
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I have no idea what the degree offset is. I did hear one explanation that control arms that are too short throw the caster off enough that the camber is affected. Then alignment shops resort to an offset balljoint to compensate for the caster bolt not being able to adjust enough for the lift. I’m hoping it’s that, since there is a 5” lift and some sort of adjustable short arms. I just don’t see how the factory would be so far off on the camber that an offset BJ would be needed. Something would have to be bent or just out of spec somewhere. Are you running any kind of lift on your rig? I’m on my phone and can’t see sigs if you have it listed.

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post #4 of 24 (permalink) Old 09-14-2019, 09:49 PM
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Quote:
Originally Posted by CustomCrew View Post
I have no idea what the degree offset is. I did hear one explanation that control arms that are too short throw the caster off enough that the camber is affected. Then alignment shops resort to an offset balljoint to compensate for the caster bolt not being able to adjust enough for the lift. Iím hoping itís that, since there is a 5Ē lift and some sort of adjustable short arms. I just donít see how the factory would be so far off on the camber that an offset BJ would be needed. Something would have to be bent or just out of spec somewhere. Are you running any kind of lift on your rig? Iím on my phone and canít see sigs if you have it listed.
I have a 2Ē leveling kit on mine. The lift doesnít have anything to do with camber. A lift can affect caster if the control arm is too short or too long.

In this picture you can see why an offset upper ball joint affects the camber.


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post #5 of 24 (permalink) Old 09-15-2019, 09:42 AM Thread Starter
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How would a 2” level kit make you need them though? We have a solid front axle. Unless the housing or knuckle were bent the offset would be adjusting a non adjustable factory spec. If camber was supposed to be adjustable Mopar would have an appropriate BJ right?

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post #6 of 24 (permalink) Old 09-15-2019, 10:48 AM
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Again, lift or leveling kits do not affects camber on a straight axle.

Parts wear, stress and are assembled differently. Yes, it could be that the axle tube is bent or stressed. Considering the miles some of these trucks have on them and what they are put through anything is possible.
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post #7 of 24 (permalink) Old 09-16-2019, 03:29 PM
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How are the tires wearing? What is the camber, visually and on a rack?
If the camber is good, with the offset bj, then for whatever reason, you need one.

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post #8 of 24 (permalink) Old 09-16-2019, 05:58 PM Thread Starter
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What is the factory specs (or even better a more narrow spec) for camber? I think I’m going to go have it checked this week the tires look awful but the guy before me let the track bar bushings get so bad that I could see through them. That on top of popping BJs and some other click I can’t seem to locate makes me attribute the tires to a poorly maintained front end.

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post #9 of 24 (permalink) Old 09-16-2019, 10:25 PM
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Camber should be zero. As with toe. On a solid axle truck, that's how its supposed to be.

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post #10 of 24 (permalink) Old 09-21-2019, 12:10 AM
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Detroit Axle makes adjustable uppers for our trucks. I have a full set of Detroit Axle ball joints in and so far so good. Make sure you go to a reputable alignment shop though. Some will just fudge the numbers so the don't have to mess with turning the uppers.

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post #11 of 24 (permalink) Old 09-21-2019, 01:29 AM
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I have a leveling kit in 06 Dodge Ram 2500, one wheel had negative camber so I threw in an SPC offset and now it is fully in spec... does it drive any better you ask, well no, but I feel better about it.

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post #12 of 24 (permalink) Old 09-21-2019, 09:36 AM
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Quote:
Originally Posted by eklarsen View Post
I have a leveling kit in 06 Dodge Ram 2500, one wheel had negative camber so I threw in an SPC offset and now it is fully in spec... does it any better to drive you ask, well no, but I feel better about it.
However, the leveling kit does not affect camber at all on a straight axle. Lift and leveling kits affect caster.

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