Correct ball joints - JeepForum.com
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post #1 of 11 Old 07-28-2021, 04:31 PM Thread Starter
yjcharlie
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Correct ball joints

Hey all,
I've replaced the ball joints on my jeep yj dana 30 around 6 months ago. I noticed the top ball joint doesnt pivot but telescopes.
I picked up another full dana 30 because I want the 3:07 ratio it has. In prepping this axle I ordered new ball joints for it.
This new top ones does pivot like the bottom one. Is this still usable?


Here is the rockauto description:

DANA 40112 {#03820872} Spicer Info
Front Upper; Replaces OE Part Number(s) 03820872, 5950542; with Dana 30 Axle; with Reverse Rotation

So, is this the wrong style of ball joint for my yj? Sadly now I do see the others that say telescoping.
Why the heck would rock sell this for a dana 30 axle for my year jeep if it's the wrong one?

Also, I got the DANA 40113 for the lowers, I wonder if thats wrong as well?
Thanks, sorry if I seem *****y, its jut now I have to go through the motions of returning them and then waiting on the right ones to come in if these are wrong.
I wish local parts stores were even somewhat close on price, but they aren't.

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post #2 of 11 Old 07-28-2021, 07:22 PM
Boojo35
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Show me a link of a telescoping ball joint. I have no idea what you are talking about..... Especially if listed on a parts site. A link would help.

Ball joints pivot in all directions to a pretty damn decent degree. I is how they flex through suspension and steering travel. That is normal.

Your description of telescoping though means to me an ball joint that has measurable wear like as in up and down. If so, It is garbage.

Still, send a parts link that describes a telescoping ball joint.
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If you cannot fix it with a hammer then it has to be an electrical problem.
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post #3 of 11 Old 07-29-2021, 05:41 AM
JeeperDon
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Yes, the upper telescopes. It's meant to adjust for wear in the lower and minor differences in axle 'C' ends. A slight ball action in the upper also allows for the use of an offset lower to adjust camber or castor.

'93 YJ, '02 GM 4.3V6, SOA, dual ARB's, 8.8+D30(WarnHubs), 4.88s, 35" Patagonia M/Ts, AX15, NP231+4:1+SYE+2LO, York OBA.
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post #4 of 11 Old 07-29-2021, 06:13 AM
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^^^granted I’ve not done many YJ ball joints. But I like to think I’m moderately knowledgeable. Because it’s jeeperdon I’ll take him at his word.

I never knew this was a thing!

It makes sense - though it does basically put 100% of the vertical on the lower ball joint. Knowing this makes me feel like the D30 C is diminutive. LOL

[size=ď3Ē]Shackles & D-rings are different things.
Cranking IS turning over
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post #5 of 11 Old 07-29-2021, 10:56 AM Thread Starter
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Quote:
Originally Posted by fishadventure View Post
^^^granted Iíve not done many YJ ball joints. But I like to think Iím moderately knowledgeable. Because itís jeeperdon Iíll take him at his word.

I never knew this was a thing!

It makes sense - though it does basically put 100% of the vertical on the lower ball joint. Knowing this makes me feel like the D30 C is diminutive. LOL

https://www.rockauto.com/en/catalog/...ll+joint,10070


on this page you will see both.
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post #6 of 11 Old 07-29-2021, 10:58 AM Thread Starter
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Quote:
Originally Posted by JeeperDon View Post
Yes, the upper telescopes. It's meant to adjust for wear in the lower and minor differences in axle 'C' ends. A slight ball action in the upper also allows for the use of an offset lower to adjust camber or castor.

The ones I've installed have zero movement side to side. I did see some for the caster/camber changes though.


So Don, do you think these upper ball joints would be ok, or should I stick to the telescoping ones?

I haven't removed the old ones yet to even verify if they would fit though.
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post #7 of 11 Old 07-29-2021, 11:23 AM
JeeperDon
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Quote:
Originally Posted by yjcharlie View Post
The ones I've installed have zero movement side to side. I did see some for the caster/camber changes though. So Don, do you think these upper ball joints would be ok, or should I stick to the telescoping ones? I haven't removed the old ones yet to even verify if they would fit though.
The upper joint side to side movement isn't critical, it's not a full ball assembly like the lower. It only really needs a degree or two of side motion. The ones you saw for camber/castor are offset. If you want to correct camber/castor you can do it in either the upper or lower joint, depending on brand. My right wheel needs the camber adjusted, since forever. I've used offset joints on top or bottom over the years, the current set have the lower doing the adjusting.

To me, you're overthinking all this a bit, at least I never dug that deep into the selection in my 60 wrenching years. I just go with the features I want, like greaseable or not, and which brands I trust.

If you have not already, do yourself a favor and buy this kit. I adds to a regular ball joint press kit and makes the job a LOT easier.

'93 YJ, '02 GM 4.3V6, SOA, dual ARB's, 8.8+D30(WarnHubs), 4.88s, 35" Patagonia M/Ts, AX15, NP231+4:1+SYE+2LO, York OBA.
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post #8 of 11 Old 07-29-2021, 01:34 PM Thread Starter
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Quote:
Originally Posted by JeeperDon View Post
The upper joint side to side movement isn't critical, it's not a full ball assembly like the lower. It only really needs a degree or two of side motion. The ones you saw for camber/castor are offset. If you want to correct camber/castor you can do it in either the upper or lower joint, depending on brand. My right wheel needs the camber adjusted, since forever. I've used offset joints on top or bottom over the years, the current set have the lower doing the adjusting.

To me, you're overthinking all this a bit, at least I never dug that deep into the selection in my 60 wrenching years. I just go with the features I want, like greaseable or not, and which brands I trust.

If you have not already, do yourself a favor and buy this kit. I adds to a regular ball joint press kit and makes the job a LOT easier.
So you would install an upper ball joint that has this much side to side movement in your YJ?
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post #9 of 11 Old 07-29-2021, 01:51 PM
JeeperDon
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That photo looks like a lower ball joint, which does not telescope and presses in upward from below the C.

'93 YJ, '02 GM 4.3V6, SOA, dual ARB's, 8.8+D30(WarnHubs), 4.88s, 35" Patagonia M/Ts, AX15, NP231+4:1+SYE+2LO, York OBA.
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post #10 of 11 Old 07-29-2021, 02:09 PM Thread Starter
yjcharlie
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Quote:
Originally Posted by JeeperDon View Post
That photo looks like a lower ball joint, which does not telescope and presses in upward from below the C.
Agreed,
I think I see what they did now. Though the part number is 40112, and right on the website is says for dana 30, on this packaging box it says the same part number, but also shows D-44....probably meant for a dana 44 axle...rockauto can be painful at times.
Mystery solved, thx!
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post #11 of 11 Old 07-29-2021, 03:38 PM Thread Starter
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Quote:
Originally Posted by JeeperDon View Post
The upper joint side to side movement isn't critical, it's not a full ball assembly like the lower. It only really needs a degree or two of side motion. The ones you saw for camber/castor are offset. If you want to correct camber/castor you can do it in either the upper or lower joint, depending on brand. My right wheel needs the camber adjusted, since forever. I've used offset joints on top or bottom over the years, the current set have the lower doing the adjusting.

To me, you're overthinking all this a bit, at least I never dug that deep into the selection in my 60 wrenching years. I just go with the features I want, like greaseable or not, and which brands I trust.

If you have not already, do yourself a favor and buy this kit. I adds to a regular ball joint press kit and makes the job a LOT easier.
Just ordered that from Amazon, thanks for the link and info! Anything to make the ball joint replacement easier is worth it to me.
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