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Topic Review (Newest First)
12-21-2010 11:40 AM
07XMan2Door
Quote:
Originally Posted by Jerry Bransford View Post
The rear tires and axle will move back half of the distance you lengthen the upper control arm. If you make the upper arms 2" longer to raise the pinion angle and leave the lower control arm length the same, the axle will move back 1".

Thanks for the reply. I hoped this would be the case but I've read on here that it will only rotate the axle, not move it back.

Now I can order just the rear uppers & front lowers.

Thanks again.
12-21-2010 05:07 AM
UnlimitedLJ04
Quote:
Originally Posted by distortedtj View Post
What issues have you came into with the trackbar clearance?
A bunch...

old JKS hit the Riddler diff cover, requiring about 3-3.5" of bumpstop. Track bar wouldn't even fit stock, but the Riddler cleared the stock track bar fine.




Contacted JKS, they pretty much denied any problems. Said it was the diff cover, not the track bar, and that I'd moved my axle too far forward. Funny, the pictures were with stock control arms. And the track bar didn't clear stock diff covers.

I now have a custom one-off track bar, similar to the JKS, but with a much bigger bend, and a modified "SOLI" diff cover, which clears with 1-3/8" bumpstop & a ZJ tie-rod. It does rub the tie-rod at full stuff, but only enough to rub paint. But to run a Currie steering (straight across) with this track bar would mean almost 2" bumpstop extension.




here's a good read on the subject:
tj front adjustable track bars for 0-3.5", does yours hit or fit? - JeepForum.com
12-20-2010 11:45 PM
distortedtj
Quote:
Originally Posted by UnlimitedLJ04 View Post
No, not for the front. Currie makes, and sells their own front track bar. The TJS and TJJ models are made my Currie, not JKS. The old Currie was made by JKS.

and No, not for the rear either. Currie makes, and sells their own rear track bar that uses a JJ + special bracket on the axle side. JKS uses a poly bushing.

Btw, both front track bars hit the stock diff cover without bumpstop extensions. Currie TJS/TJJ model requires 2". JKS requires a bit more. Any aftermarket diff cover besides the Barnett requires even more bumpstop extension.
Again...reading to much into the statement. "counter part" As previously stated,,,same item. I'm not arguing JJ's or bushings. But the SAME counter part. I haven't ordered a trackbar for 2 1/2yrs from either company but the previous ones I've dealt with are indeed the same product. Both JKS and currie do have unique designs and products. I've had and used several of both. The Currie control arms I have in the garage were purchase new 2yrs ago and are the exact same as the JKS arms I've installed on a few TJ's. Products do change, I don't contest that.
To the two companies defense YES....they do have several different versions that are indeed differnent products that anyone can order...but it all depends what you order or purchase. YES..Currie does have designs that are different from JKS's and vice-versa. And you are correct that the two companies are merging further apart. It's good to hear that they are seperating more in design and their newer product.

Also I'm the lucky one of the bunch. My Front JKS trackbar with rebuildable Currie joint...I cant get the thing to hit my diff cover. Luck I guess. I do have 1.5'' bumpstops but that is it in the front. I have installed a few that do hit on aftermarket covers and the covers need clearance or trackbar replaced to cure the issue. Never had any issues with stock D30 or D44 cover with hitting or clearance Issues. ARB covers seem to be the worst for trackbar clearance from my experiance.

What issues have you came into with the trackbar clearance?
12-20-2010 11:42 PM
Jerry Bransford The rear tires and axle will move back half of the distance you lengthen the upper control arm. If you make the upper arms 2" longer to raise the pinion angle and leave the lower control arm length the same, the axle will move back 1".
12-20-2010 11:28 PM
07XMan2Door If I just lengthen my upper rear control arms enough to tilt my pinion up for the new drive shaft & leave my lowers stock, will my rear tires move away from my pinch seams at all? If so, how much?
I have 3.5 inches of lift.

Thanks
12-20-2010 04:45 PM
UnlimitedLJ04
Quote:
Originally Posted by TheTJRod View Post
You just made me even more happy about what I am doing. I am linking the rear with a tri 4-link that removes need for the track bar. And I am getting a OTK crossover steering using a HP D30 from an XJ and using WJ outers and 3-link+trackbar. I have to relocate my trackbar (axle side) anyway due to the OTK crossover steering, relocating it over the axle and not infront of it. As well I need to fab a new frame mount for it to. As I am trying to keep a minimal lift and go to 35's soon then 37's later without getting more lift.
Do you understand all thats involved with an OTK conversion, if you intend to eliminate bumpsteer and keep the track bar the same length, parallel and in the same plane as the drag link? With minimal lift and good uptravel thats going to mean notching the frame to clear the relocated track bar at full stuff. Alternatively, you can bumpstop it...IIRC its like 2-3" or so...mrblaine over on JF knows all with regard to that. Most people just shorten the track bar and tolerate the larger axle shift with droop.
12-20-2010 04:02 PM
07XMan2Door Thanks Unlimited & tjrod,

I thought that the only way to lengthen wheelbase was to replace BOTH the upper & lower control arms on each end. I thought replacing just uppers or lowers would simply rotate, not move the axle.

So all I need is a new Tom Woods drive shaft & rear uppers (longer)& front lowers (shorter) right???

Thanks
12-20-2010 02:35 PM
TheTJRod You just made me even more happy about what I am doing. I am linking the rear with a tri 4-link that removes need for the track bar. And I am getting a OTK crossover steering using a HP D30 from an XJ and using WJ outers and 3-link+trackbar. I have to relocate my trackbar (axle side) anyway due to the OTK crossover steering, relocating it over the axle and not infront of it. As well I need to fab a new frame mount for it to. As I am trying to keep a minimal lift and go to 35's soon then 37's later without getting more lift.
12-20-2010 01:33 PM
UnlimitedLJ04
Quote:
Originally Posted by jeepinmichguy View Post
I never encountered someone that bent them on there, ill go search and see what I can find. You may be right, I have just never seen it.

That would be longer than stock though right? Ill measure the wifes for you tonight, I dont remember what they are set at. We will be ordering a set of lowers soon as well, I'll get pics and measurements for you when we do. I know how to find you
yea, one was a post from Gerald @ Savvy. guy bent a Currie upper in an accident, but luckily the UCA mount didn't rip off. that would be the "for the better" one.

the other guy (i'll never find the post again.) bent a lower a few times and tried to straighten it out in a press or something. it just kept bending...obviously because the steel was stressed well past the yield point. mrblaine had posted on that one. thats the "for the worst" one.

With the Currie uppers I had, you could get them out to 14". It just had about 3 threads catching inside the tube. Three or four full turns and the joint would fall out. I'd say the safe Currie upper rear adjustment safe area was 13.25" to 13.75". The Rokmen rear uppers are 13.5" to ~14.5", and they make CV versions that go 14.5" to 15.5". Theres just more length selection, and the threaded stud is longer.

Quote:
Originally Posted by 07XMan2Door View Post
I'm confused. Some say you need to replace just the rear lowers. When you lift the Jeep with the stock control arms on, the axles move towards the center of the Jeep. I would think that shortening the rear lowers to line up your pinion would move the axle even further towards the center of the jeep.
Ok - to do it RIGHT, you need rear lowers that can adjust about .25-.5" SHORTER than stock, and uppers that can go 0-1"+ LONGER than stock.

Most will tell you lowers effects wheelbase, while uppers effects pinion angle. Well the reality is both effect both properties. To fit 35s without trimming the body, you need to center the tire in the wheelwell - AT FULL BUMP. So remove the springs, remove the jounce bumper and set the Jeep on the bump extensions needed for the shock travel. You end up rotating the pinion about the wheel center. Adjusting the uppers out only will extend your wheelbase and adjust pinion angle at the same time.

Running too long of rear uppers (and/or rear lowers) can push your diff cover into the gas tank skid, and cause track bar interference issues. You CAN run just rear uppers to adjust for pinion angle...but you may have issues, depending on your uptravel requirements.

I have my Rokmen lowers sucked in to the max - 15.75", stock length. The rear uppers (non-CV version), with a CV shaft, are about ~13.75" or so now...with a good 1" of thread left inside, plenty of thread engagement for me.

One place you do NOT want to lengthen the uppers is in the front. You want to keep them stock length unless you've done major steering and track bar modifications, or properly checked the clearances at full bump. The stock track bar mount will NOT clear aftermarket track bars without bumpstop extension...its too close to the axle. The track bar ends up hitting the diff cover. So you lengthen the front lowers to gain caster back with a lift...but you don't change the upper length without checking clearance issues. You will gain wheelbase with the lowers being pushed out.

For the LCG, that presents a problem both front and rear. Fender clearance, and suspension clearance becomes an issue...unless you don't mind not gaining uptravel with a lift, and bumpstopping the crap outta your suspension.
12-20-2010 12:51 PM
jeepjones How about BDS with JJ's, only BDS has a no fine print warranty. This argument could go on forever. To the OP, you get what you pay for, if you never wheel the jeep get the cheap ones, if you wheel it get the good ones.
12-20-2010 12:42 PM
TheTJRod
Quote:
Originally Posted by 07XMan2Door View Post
I'm confused. Some say you need to replace just the rear lowers. When you lift the Jeep with the stock control arms on, the axles move towards the center of the Jeep. I would think that shortening the rear lowers to line up your pinion would move the axle even further towards the center of the jeep.

Those Ironman's look nice. Never heard of them or Rokman's. I'll check both out.

I think to get proper pinion angle & recenter your rear axle you would need to get both upper & lower rear C Arms. Yes? No? Thanks
Rokmen has been around awhile and and are well trusted. Ironman I just found out about them through my Local Jeep Club from the guys who have been around a lot longer than me. Also "C" arms? I'm not understanding.

I would definitely replace both upper and lower when doing a lift. Kits that only come with lower arms normally means that they are shorter than stock to keep the pinion angle at an acceptable level. With getting upper and lower you can keep your wheelbase and adjust your pinion angle and maybe even lengthen your wheelbase.
12-20-2010 12:07 PM
07XMan2Door I'm confused. Some say you need to replace just the rear lowers. When you lift the Jeep with the stock control arms on, the axles move towards the center of the Jeep. I would think that shortening the rear lowers to line up your pinion would move the axle even further towards the center of the jeep.

Those Ironman's look nice. Never heard of them or Rokman's. I'll check both out.

I think to get proper pinion angle & recenter your rear axle you would need to get both upper & lower rear C Arms. Yes? No? Thanks
12-20-2010 11:52 AM
jeepinmichguy
Quote:
Originally Posted by UnlimitedLJ04 View Post
I've counted two folks over on JF that bent Currie arms. One was for the better, one for the worse. Also, if you follow the Currie instructions, the upper rears don't adjust longer than stock. You can get maybe 13.75" max out of them, 13.5" is stock. I tried to use Currie upper rears, and I didn't feel comfortable with the lack of thread engagement when extending them. I ended up selling them and buying Rokmen's...which have over 1" more thread.
I never encountered someone that bent them on there, ill go search and see what I can find. You may be right, I have just never seen it.

That would be longer than stock though right? Ill measure the wifes for you tonight, I dont remember what they are set at. We will be ordering a set of lowers soon as well, I'll get pics and measurements for you when we do. I know how to find you
12-20-2010 08:39 AM
TheTJRod You guys should check out Ironman

You can get Rear Upper control arms with 4" of adjustment for $195. They use Currie JJ's on one side and tampered rubber bushings on the other. Oh and they use 1.25" solid steel.
12-20-2010 07:59 AM
UnlimitedLJ04
Quote:
Originally Posted by distortedtj View Post
I'm not arguing that JJ are better. My comment is simply that the JKS and Currie track bars ARE the SAME product. As are the JKS control arms the same as the Currie counter part. That is all.
No, not for the front. Currie makes, and sells their own front track bar. The TJS and TJJ models are made my Currie, not JKS. The old Currie was made by JKS.

and No, not for the rear either. Currie makes, and sells their own rear track bar that uses a JJ + special bracket on the axle side. JKS uses a poly bushing.

Btw, both front track bars hit the stock diff cover without bumpstop extensions. Currie TJS/TJJ model requires 2". JKS requires a bit more. Any aftermarket diff cover besides the Barnett requires even more bumpstop extension.
12-20-2010 07:51 AM
UnlimitedLJ04
Quote:
Originally Posted by jeepinmichguy View Post
Curries definantly adjust further than stock arms. When is the last time you heard of a currie arm failure anyway? I never have.
I've counted two folks over on JF that bent Currie arms. One was for the better, one for the worse. Also, if you follow the Currie instructions, the upper rears don't adjust longer than stock. You can get maybe 13.75" max out of them, 13.5" is stock. I tried to use Currie upper rears, and I didn't feel comfortable with the lack of thread engagement when extending them. I ended up selling them and buying Rokmen's...which have over 1" more thread.

On the downside of Rokmen, their lowers don't adjust shorter than stock. That may or may not be a big deal for you, depending if you want to cut the rear fenderwell to fit 35s at full stuff. You may also run into issues with the gas tank rubbing an aftermarket diff cover at stock length, or when extending wheelbase. Thats why Currie's upper rears don't adjust much longer than stock...they want you to adjust the lowers shorter more to change pinion angle.
12-19-2010 11:01 PM
jeepinmichguy
Quote:
Originally Posted by distortedtj View Post
I'm not arguing that JJ are better. My comment is simply that the JKS and Currie track bars ARE the SAME product. As are the JKS control arms the same as the Currie counter part. That is all.

As for owning product X or Y. I didn't state my opinion on what the OP should use. I'd build the arms and add Currie joint.
Gotcha.
12-19-2010 11:00 PM
jeepinmichguy
Quote:
Originally Posted by moneypit-TJ View Post
surprisingly this is true. Currie is cheaping out...Or you can argue that Rokmen CA's are overkill compaired to every other short arm CA. the jonnie joints that come on the currie CA's are smaller than the ones that come on the Rokmen arms, espcially for the lowers, the lowers are huge. i spend 20 min on the phone with both companys before i bought the Rokmens. Yes, they are the currie JJ's but Rokmen also double welded and uses heavier DOM tubing. Not to mention they adjust out further than stock arms, currie's dont
Curries definantly adjust further than stock arms. When is the last time you heard of a currie arm failure anyway? I never have.
12-19-2010 10:22 PM
distortedtj
Quote:
Originally Posted by jeepinmichguy View Post
J Joints vs. rubber. J Joints will win all day long. Just because the JKS arms pivot around themselves doesn't mean the rubber won't bind. I dont see the point if you are going to spend the money on not getting a superior joint, especially when the curries can be had for cheaper.

Also the JJ will last longer, anyone who has had after market arms should be able to attest to this.
I'm not arguing that JJ are better. My comment is simply that the JKS and Currie track bars ARE the SAME product. As are the JKS control arms the same as the Currie counter part. That is all.

As for owning product X or Y. I didn't state my opinion on what the OP should use. I'd build the arms and add Currie joint.
12-19-2010 10:07 PM
UnlimitedLJ04
Quote:
Originally Posted by moneypit-TJ View Post
surprisingly this is true. Currie is cheaping out...Or you can argue that Rokmen CA's are overkill compaired to every other short arm CA. the jonnie joints that come on the currie CA's are smaller than the ones that come on the Rokmen arms, espcially for the lowers, the lowers are huge. i spend 20 min on the phone with both companys before i bought the Rokmens. Yes, they are the currie JJ's but Rokmen also double welded and uses heavier DOM tubing. Not to mention they adjust out further than stock arms, currie's dont
and Rokmen is smart enough to eliminate the stupid grease bolts that don't work well, and put a grease fitting directly on the JJ.
12-19-2010 09:16 PM
moneypit-TJ
Quote:
Originally Posted by Jerry Bransford View Post
Rokmen arms made with Currie's Johnnie Joints, developed by Currie and named after John (Johnnie) Currie, are better than Currie arms with Currie's Johnnie Joints?

I don't think so.
surprisingly this is true. Currie is cheaping out...Or you can argue that Rokmen CA's are overkill compaired to every other short arm CA. the jonnie joints that come on the currie CA's are smaller than the ones that come on the Rokmen arms, espcially for the lowers, the lowers are huge. i spend 20 min on the phone with both companys before i bought the Rokmens. Yes, they are the currie JJ's but Rokmen also double welded and uses heavier DOM tubing. Not to mention they adjust out further than stock arms, currie's dont
12-19-2010 08:24 PM
Rubicon2 Jks
12-19-2010 08:23 AM
UnlimitedLJ04 go Rokmen
12-19-2010 08:18 AM
Jerry Bransford
Quote:
Originally Posted by inglisleslie View Post
your all wrong. Rokmen with johnny joints are the best. if you call them up they will even build to a custom length(i.e. trying to do a 1-3 inch short arm stretch in the rear)
Rokmen arms made with Currie's Johnnie Joints, developed by Currie and named after John (Johnnie) Currie, are better than Currie arms with Currie's Johnnie Joints?

I don't think so.
12-19-2010 08:14 AM
jeepinmichguy
Quote:
Originally Posted by distortedtj View Post
*cough*

compare the JKS to Currie arms....or their adjustable track bars.

You'll find them very simular....almost like they are the same product.
J Joints vs. rubber. J Joints will win all day long. Just because the JKS arms pivot around themselves doesn't mean the rubber won't bind. I dont see the point if you are going to spend the money on not getting a superior joint, especially when the curries can be had for cheaper.

Also the JJ will last longer, anyone who has had after market arms should be able to attest to this.
12-19-2010 08:04 AM
jeepinmichguy
Quote:
Originally Posted by inglisleslie View Post
your all wrong. Rokmen with johnny joints are the best. if you call them up they will even build to a custom length(i.e. trying to do a 1-3 inch short arm stretch in the rear)
I'm sure you didt come from JF over to here a magically figure out how to build a Jeep without 1,000 questions....
12-19-2010 07:53 AM
Splnkr I, too, am researching for a set of rear adjustable control arms. My first conclusion is to make sure whatever I buy has Johnny Joints on both ends.....
12-18-2010 10:34 PM
distortedtj *cough*

compare the JKS to Currie arms....or their adjustable track bars.

You'll find them very simular....almost like they are the same product.
12-18-2010 10:24 PM
MR.CLIFFORD
Quote:
Originally Posted by inglisleslie View Post
your all wrong. Rokmen with johnny joints are the best. if you call them up they will even build to a custom length(i.e. trying to do a 1-3 inch short arm stretch in the rear)
My control arms are best. Cause they are mine!
12-18-2010 10:13 PM
inglisleslie your all wrong. Rokmen with johnny joints are the best. if you call them up they will even build to a custom length(i.e. trying to do a 1-3 inch short arm stretch in the rear)
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