Johnny Joint tube side upper control arm install - JeepForum.com
 
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post #1 of 7 Old 08-18-2010, 04:43 PM Thread Starter
skain8
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Thumbs up Johnny Joint tube side upper control arm install

A bit of background -- my issue was wanting an upgrade for the upper control arm bushings, which I was wearing out a bit too fast for my liking. Not only that, but they are a major PITA to replace. I looked to Currie's Johnny Joint, which others have used as a replacement on the housing side, which is a direct swap with the 2" jj. There is no direct swap for the tube side mount, however. In my opinion, it only makes sense to use either 2 bushings, or 2 jj's, not a combination of both. [IRO long arm users do not have this issue since the "iron y" negates the passenger upper control arm].

Currie joints are arguably the best out there due to quality, strength and the added benefit of 30* of movement over a "fixed" rubber bushing. The natural movement of the joint is good for my set-up as well since Clayton's upper arms are just a tad bit misaligned by the nature of their design (which is probably why I have been eating through upper bushings more rapidly due to the constant preload). The joints do have an interior urethane bushing, and not simply a solid metal joint as some would think. Plus, they are 100% rebuildable in place, which is even better.

Currie makes a bracket piece with the jj welded in place. They market it to TJ's, XJ's, etc... and not to the WJ/ZJ crowd apparently because the tube side upper control arm mount is more narrow. I ordered this anyway and figured I'd make it work:

currie.jpg

Note that it comes with an extra 2" jj, which really isn't bad for the total price. (SEE FOR SALE SECTION for my spare 2" JJ )

The piece is solid metal. It is indeed larger than the WJ upper control arm bracket, so I had to shave a bit off 2 sides. That was all the modification it needed. I cut off the existing bracket, leaving 2" of bracket. Placed the Currie piece inside, gave it a few whacks with a hammer, and it was then ready to weld. The finished mount is very solid. I may still put a couple gussets on there down the road for even more strength, but is probably overkill. The following pics show the end product, and I finished her off with the wire wheel and a fresh paint job. In the one pic, you can see the empty housing bore where the other jj goes.

jeep-003.jpg

jeep-004.jpg

jeep-007.jpg

jeep-009.jpg


Edit: sorry if the pics are xlarge & upside down -- not sure what happened there.


'02 WJ: 4.7L, 5", HP44/9", 231HD, tall & skinny KM2's
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post #2 of 7 Old 08-18-2010, 09:35 PM
SplitNail
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Looks good. I wanna add johny joints soon too.

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post #3 of 7 Old 08-19-2010, 03:10 PM
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nice
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post #4 of 7 Old 08-22-2010, 10:03 PM
BLACKzj52
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just saw this. im thinking about getting this kit. have you got a chance go drive around with them installed?

how do you like it?

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post #5 of 7 Old 08-23-2010, 10:36 AM
tsconver
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I think I am going Claytons in January and will be doing this mod as well, I already have a johnny inthe diff side for my IRO three link.

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post #6 of 7 Old 08-23-2010, 06:13 PM Thread Starter
skain8
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Quote:
Originally Posted by BLACKzj52 View Post
just saw this. im thinking about getting this kit. have you got a chance go drive around with them installed?

how do you like it?
Yeah, it's been in for about a week now. Could be my imagination, but the front end feels solid. I was slightly concerned about more road "noise". The only rubber bushings I have left are the front lowers and I can't tell any difference. After reading a bunch about rubber vs solid joints on MC and Pirate the more I'm convinced that's web wheeler lore.

'02 WJ: 4.7L, 5", HP44/9", 231HD, tall & skinny KM2's
Half-Ton axle swap guide
231HD build info

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post #7 of 7 Old 08-24-2010, 03:08 PM
BLACKzj52
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Quote:
Originally Posted by tsconver View Post
I think I am going Claytons in January and will be doing this mod as well, I already have a johnny inthe diff side for my IRO three link.
likewise. ill be putting my clayton knock off kit on here soon


Quote:
Originally Posted by skain8 View Post
Yeah, it's been in for about a week now. Could be my imagination, but the front end feels solid. I was slightly concerned about more road "noise". The only rubber bushings I have left are the front lowers and I can't tell any difference. After reading a bunch about rubber vs solid joints on MC and Pirate the more I'm convinced that's web wheeler lore.
good news glad to hear. think i will be doing this mod then

did you weld any of the currie mount to the axle itself? or just to the old uca bracket?

- John - 23 and learning <-- ORIGINAL
- 1996 Black ZJ Limited: 5.9 swap, LA's, axles, absolutely built to hell
- 1998 Platinum 5.9 Limited: DD with some lighter modifications
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