Which Johnny Joint is used as a replacement for the stock upper control arm bushings?

Irun

A vicious cycle of doing, undoing, and re-doing!
Supporting Member
Joined
Oct 31, 2019
Messages
8,107
Location
Virginia
I'm currently finalizing plans for a HP30 build. One of the last parts needed is to replace the stock upper control arm bushings. I've found references to use of Johnny Joints, but can't seem to nail down the specific part. My plan would be to reinforce the stock passenger side mount with something like what @mrblaine posted in the picture. I'm not able to measure the housing now, but believe a 2" joint is needed. I've done some digging and best I can tell it's one of these two. Also, they say a bolt is included, but don't say if it's 7/16" or 1/2". Anyone know if one of these two is correct?

https://www.rockjock4x4.com/CE-9112-2-Johnny-Joint-Rod-End-w-Greasable-Bolt-2-x-.4375-Ball
https://www.rockjock4x4.com/CE-9112-12-2-Johnny-Joint-Rod-End-w-Greasable-Bolt-2-x-.500-Ball
1580236992359-png.png
 
I'm currently finalizing plans for a HP30 build. One of the last parts needed is to replace the stock upper control arm bushings. I've found references to use of Johnny Joints, but can't seem to nail down the specific part. My plan would be to reinforce the stock passenger side mount with something like what @mrblaine posted in the picture. I'm not able to measure the housing now, but believe a 2" joint is needed. I've done some digging and best I can tell it's one of these two. Also, they say a bolt is included, but don't say if it's 7/16" or 1/2". Anyone know if one of these two is correct?

https://www.rockjock4x4.com/CE-9112-2-Johnny-Joint-Rod-End-w-Greasable-Bolt-2-x-.4375-Ball
https://www.rockjock4x4.com/CE-9112-12-2-Johnny-Joint-Rod-End-w-Greasable-Bolt-2-x-.500-Ball
View attachment 304606
I use two of the ones they supply for the diff side in the JJ conversion kit for the uppers. It has the shoulder that stops it when hammered into the cast mount.
 
  • Like
Reactions: Irun
  • Like
Reactions: Mike_H
Might be reviving a dead topic but.... what im understanding is that the driver side jj will work for the passenger side? Just reinforce the stock bracket before install to avoid bending the stock bracket?
 
Might be reviving a dead topic but.... what im understanding is that the driver side jj will work for the passenger side? Just reinforce the stock bracket before install to avoid bending the stock bracket?

All correct. But, it is a slight bit more than reinforcement. The extruded flange need to be trimmed down to flat.
 
All correct. But, it is a slight bit more than reinforcement. The extruded flange need to be trimmed down to flat.

Okay, so trim down the protruding edge on the passenger side and weld in the jj housing/sleeve in that opening then reinforce/gusset the bracket up to the top? My apologies the the arduous question. Just trying to make sure I'm correct before moving forward on this.
 
Okay, so trim down the protruding edge on the passenger side and weld in the jj housing/sleeve in that opening then reinforce/gusset the bracket up to the top? My apologies the the arduous question. Just trying to make sure I'm correct before moving forward on this.

Pretty much. Oddly, OEM bushings both go in from the same side so the JJ barrels should as well.
 
  • Like
Reactions: freedom_in_4low
How often are you seeing dw as a result of these joints? It's been discussed here before. I am on the fence about these vs mopar bushings.

I think for the shocks in running for now, I may just stick with the bushings.
 
How often are you seeing dw as a result of these joints? It's been discussed here before. I am on the fence about these vs mopar bushings.

I think for the shocks in running for now, I may just stick with the bushings.

Johnny joints almost never are the reason for dw unless they are worn completely out and never greased. The firm recommendation to me when contemplating.... what is your jeep going to be used for and do you mind the increased harshness of nvh on the street. If it's more of a daily stock bushings are plenty fine. That's what I've found in my research.

Others such as @mrblaine could probably explain better.
 
Johnny joints almost never are the reason for dw unless they are worn completely out and never greased. The firm recommendation to me when contemplating.... what is your jeep going to be used for and do you mind the increased harshness of nvh on the street. If it's more of a daily stock bushings are plenty fine. That's what I've found in my research.

Others such as @mrblaine could probably explain better.

https://wranglertjforum.com/threads/best-adjustable-front-upper-control-arms.76587/

I'm talking about this thread where is discussed and this one.

https://wranglertjforum.com/threads/death-wobble-question.38040/page-3
 

Fair enough, I don't know everything or even close to enough to give you a solid answer about that thread. Though I don't think it's a common issue I'm interested to know more as well. I'm still going that direction so I'll update as to what happens with mine when I'm done. Dw or no dw🤣