[Imped]

[QUOTE=mrblaine;6371450]I wouldn't use a Clevite bushing for anything other than mounting a muffler on a custom hanger or for motor mountsQUOTE]

Guys, he said he WOULD use a clevite bushing for a motor mount. He's not disagreeing.

[mrblaine]

Originally Posted by TeraFlex

The bushings perform well through a certain range of motion.

Precisely and what happens if you exceed that range of motion by running a longer travel suspesion? Rhetorical I know, but the fact remains, they do have limits to their range of motion and if you exceed or run up to that limit, you break the bonded center bolt sleeve loose and the bushing is trash.

They are also designed to handle a specific load and when you exceed that with heavier axles, tires, braking, armor, and all the rest of the crap we put in our rigs, it's takes it's toll.

The main reason most competitors could get by longer, is their rigs are typically lighter.

[cincytj]

I look at that bushing in post two and it seems to be a patent infringement on the Currie JJ. I hope Currie has some patent protection. The parts almost look interchangable except for the one threaded part. Either way its certainly not a huge difference I can see to make me want to pay a guy for a copy rather than get the original from a guy you know tests hard.

[CCJ]

Why didn't anyone mention J style Currie JJ's?

[TJ311]

I know this is kind of a dead thread but there's good info in here and I have one question to ask; how do control arm mounts (both frame and axle end) handle having double JJ's? They appear pretty thin and I'd imagine without anything to provide any give or vibration protection, they might start to wallow out. Am I correct or no?

I only ask because I'm in the midst of a full axle swap and am needing to replace some bushings in the process. I'm moving to adjustable CA's as well so the question is pertinent.

[johnny9]

it will be more relaxing on your frame mounts also if you have a jj or flex joint in the bracket..with the stock frame mounts you hear of them tearing off,and its true.i still have stock brakets for now but will change them when they fail lol..im thinking the new jj,s will only help the stock brackets..

[Savvy]

I'm not so sure the bushing have anything to do with vibration. You're Jeeps are riding on big pillows of air that dimishes any vibration rather effectively.

I can tell you all of my DD Jeeps are on JJs and the ride is more firm and vibration free. Not to mention they articulate much better and you can maintain them by lubing them every so often.

[johnny9]

thanks,,after a lot of reading i will be going with either jj,s or ballistic fab joints..do you have experiance with the bf joints or joints that have the nylatron races? ive read there top notch and went 2-3 yrs w/out grease and are just as tight as when installed..thats info from summit machine..they use the nylatron races..they shouldnt be any harder ride than a jj would they..i dont mind a few bucks more mulla when i can do it..
is the race in a jj the same nylatron stuff? i read a lot on nylatron and it sounds badd azz

[Savvy]

Originally Posted by johnny9

thanks,,after a lot of reading i will be going with either jj,s or ballistic fab joints..do you have experiance with the bf joints or joints that have the nylatron races? ive read there top notch and went 2-3 yrs w/out grease and are just as tight as when installed..thats info from summit machine..they use the nylatron races..they shouldnt be any harder ride than a jj would they..i dont mind a few bucks more mulla when i can do it..
is the race in a jj the same nylatron stuff? i read a lot on nylatron and it sounds badd azz

I was wheeling in Moab a couple of weeks ago with a guy and he had BF and Rockcrawler joints on his rig. The BF joints actually were loosening quite a bit. They are adjustable and have small set screw that locks down the adjusting ring. Couple things struck me as odd. The set screw can only lock down the adjusting ring in predetermined locations so it can be either too loose or too tight if the adjustment falls in the middle. The second thing which really messed this guy up was the set screw seized up. Making it impossible to adjust or maintain the joint. He tried drilling it out, easy outs and just made a mess of it. It was was very loose and he was very unhappy.

BF makes great stuff and it may have been an anomoly but that's how I saw it. RC joints big thumbs down. Metric bolts make getting replacement 14mm 10.9 bolts very difficult. You would have thought one of the shops or hardware stores would have carried some. Nope only 8.8 bolts like the ones he destroyed and only 2 in the whole town!

As for races, why would you go 2-3 years without greasing it? Squirt a little every oil change and you'll have years for trouble free joints. You won't be disappointed with Currie JJs. The only problem with JJs is they are back ordered until the end of the month!

[johnny9]

i will be in touch with you when im ready to order..ive herd good things and thats a good thing i dont really like the snap rings but im sure they cant be bad if everyones runnin,em.
id grease,em for sure,just telling what i read..
do ya know whats in a jj ? is it nylatron or nylon?

[Imped]

JJ's use a urethane race.
Johnny Joint®

I've come a long way in understanding JJ's since making this thread back in the day.

[mrblaine]

Originally Posted by johnny9

i will be in touch with you when im ready to order..ive herd good things and thats a good thing i dont really like the snap rings but im sure they cant be bad if everyones runnin,em.
id grease,em for sure,just telling what i read..
do ya know whats in a jj ? is it nylatron or nylon?

A lot of folks have trouble with the snap rings. The Currie design is unique in how the snap ring rarely sees the side loads.

There used to be a local competitive rock crawling team called Team Purple. The rig was a custom YJ with a tri link lower front and rear suspenion with straight uppers. The single joint at the frame for the Y link was a Currie JJ with the bolt horizontal. All the side to side locating was done by that single joint and the owner could not do a comp without rolling several times.

That single joint never had the snap ring popped out even after multiple rolls.

That was enough to convince me of just how good the JJ's really are.

[johnny9]

sure is good talking to you guys and learning more and more..kinda makeing my decision easyer lol..
while ive got your attention do ya know a good thread about outboarding the rear shocks that could tell me how long the mount most popular used would be..i make most things myself and wanna make the mounts from plate i have laying around but not sure on the height..or they would have been done already.

johnny joints will be all the joints in my build also..im getting tired of reading so much lol..

[DaFuzz]

Very informative thread, I've been wondering about the pros/cons of JJ's for a while.

[mrblaine]

Originally Posted by johnny9

sure is good talking to you guys and learning more and more..kinda makeing my decision easyer lol..
while ive got your attention do ya know a good thread about outboarding the rear shocks that could tell me how long the mount most popular used would be..i make most things myself and wanna make the mounts from plate i have laying around but not sure on the height..or they would have been done already.

johnny joints will be all the joints in my build also..im getting tired of reading so much lol..

Joe did a pretty good job on his, search under the username Humboldt.