Adjustable Control Arms - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > TJ Jeep Wrangler Forum > TJ Tech Forum

Join Wrangler Forum Today


Reply
 
Thread Tools

Please support our sponsors and let them know you heard about them on WranglerForum.com
Old 03-08-2013, 12:16 AM   #1
Jeeper
 
SEAICE's Avatar
 
Join Date: Aug 2012
Posts: 301
Images: 10
Adjustable Control Arms

I have a 3" Teraflex lift and I have no vibrations or DW... but my steering is too light compared to stock . I'm wanting to install adjustable front control arms to dial-in some caster and make my steering effort greater. Does it matter if I install upper versus lower control arms? The uppers seem to be a little cheaper, and I'd rather have threaded parts up & out of the way.

Thanks

SEAICE is offline   Quote Quick Reply
Old 03-08-2013, 07:50 AM   #2
Jeeper
 
UnlimitedLJ04's Avatar
 
Join Date: Aug 2010
Posts: 7,098
you'll start by extending the lowers. you can also install uppers, but you likely will not adjust the uppers away from stock length.

__________________
Suggested Tech Readings
UnlimitedLJ04 is offline   Quote Quick Reply
Old 03-08-2013, 09:58 AM   #3
Jeeper
 
PStov98TJ's Avatar
 
Join Date: Dec 2012
Location: Long Beach, Mississippi
Posts: 2,008
Unlimited, I've been kicking around the idea of adj. CA's as well. So I was wondering, exactly how would you adjust the control arms? If I'm not mistaken you'd need to lengthen them right? And by how much? Thanks! Should help the OP too.
__________________
OME suspension, some JKS stuff, 33x12.50 Goodyear MTR's w/Kevlar, 15x8 Pacer wheels, thedirtworx rear tire carrier
PStov98TJ is offline   Quote Quick Reply
Old 03-08-2013, 10:15 AM   #4
Jeeper
 
Imped's Avatar
 
Join Date: Jan 2011
Location: Indy
Posts: 3,269
Just visualize it.....lengthening the lowers will rotate the housing around the upper mount, moving the pinion down, lower ball joint forward and upper ball joint rearward....ie, increasing caster angle. By how much should you lengthen the arms? By the amount that puts your caster where you want it. The final length is a byproduct of caster.
__________________
Daily Driver Rock Rig
IndyORV
Imped is offline   Quote Quick Reply
Old 03-08-2013, 10:19 AM   #5
Jeeper
 
PStov98TJ's Avatar
 
Join Date: Dec 2012
Location: Long Beach, Mississippi
Posts: 2,008
Quote:
Originally Posted by Imped View Post
Just visualize it.....lengthening the lowers will rotate the housing around the upper mount, moving the pinion down, lower ball joint forward and upper ball joint rearward....ie, increasing caster angle. By how much should you lengthen the arms? By the amount that puts your caster where you want it. The final length is a byproduct of caster.
Good point! Thanks Imped. Never really thought of it that way. I understand most everything of suspension geometry except for CA's, which unfortunately are pretty important. But for some reason they confused me a little. Much better understanding now. Thanks!
__________________
OME suspension, some JKS stuff, 33x12.50 Goodyear MTR's w/Kevlar, 15x8 Pacer wheels, thedirtworx rear tire carrier
PStov98TJ is offline   Quote Quick Reply
Old 03-08-2013, 10:20 AM   #6
Jeeper
 
budke's Avatar
 
Join Date: Feb 2013
Location: Jacksonville, FL
Posts: 3,133
Images: 6
Can't adjust the pinion angle too much though or you'll be burning through u-joints like theres no tomorrow.
__________________
02 KJ- Sold
92 YJ- Totaled
04 TJ- Brought back from near death
Sometimes I question my sanity. Occasionally it replies.

http://www.wranglerforum.com/f5/shor...on-221142.html
budke is offline   Quote Quick Reply
Old 03-08-2013, 10:21 AM   #7
Jeeper
 
lynn's Avatar
 
Join Date: Jul 2011
Location: York, PA
Posts: 1,104
With my 3" lift, Currie LCAs set to 16" restored enough of my caster and also eliminated the annoying 47-53 mph shimmy.

YMMV
__________________
Lynn
'05 LJ
lynn is offline   Quote Quick Reply
Old 03-08-2013, 10:23 AM   #8
Jeeper
 
PStov98TJ's Avatar
 
Join Date: Dec 2012
Location: Long Beach, Mississippi
Posts: 2,008
Quote:
Originally Posted by budke View Post
Can't adjust the pinion angle too much though or you'll be burning through u-joints like theres no tomorrow.
Of course. I do understand the u-joints and the angles needed for driveshafts to operate properly; I was just confused about how to/which ones to adjust to get the desired result.
__________________
OME suspension, some JKS stuff, 33x12.50 Goodyear MTR's w/Kevlar, 15x8 Pacer wheels, thedirtworx rear tire carrier
PStov98TJ is offline   Quote Quick Reply
Old 03-08-2013, 10:25 AM   #9
Jeeper
 
budke's Avatar
 
Join Date: Feb 2013
Location: Jacksonville, FL
Posts: 3,133
Images: 6
Quote:
Originally Posted by PStov98TJ View Post
Of course. I do understand the u-joints and the angles needed for driveshafts to operate properly; I was just confused about how to/which ones to adjust to get the desired result.
Most people go with adjustable uppers when they lift since you have to adjust the angle up. But really, both do the same thing, you just adjust them different way to get the same result.
__________________
02 KJ- Sold
92 YJ- Totaled
04 TJ- Brought back from near death
Sometimes I question my sanity. Occasionally it replies.

http://www.wranglerforum.com/f5/shor...on-221142.html
budke is offline   Quote Quick Reply
Old 03-08-2013, 10:30 AM   #10
Jeeper
 
Imped's Avatar
 
Join Date: Jan 2011
Location: Indy
Posts: 3,269
Quote:
Originally Posted by PStov98TJ View Post
I understand most everything of suspension geometry except for CA's
The mounting points for the control arms dictate the "suspension geometry" so it would behoove you to understand their functions.
__________________
Daily Driver Rock Rig
IndyORV
Imped is offline   Quote Quick Reply
Old 03-08-2013, 10:43 AM   #11
Jeeper
 
PStov98TJ's Avatar
 
Join Date: Dec 2012
Location: Long Beach, Mississippi
Posts: 2,008
Quote:
Originally Posted by Imped View Post
The mounting points for the control arms dictate the "suspension geometry" so it would behoove you to understand their functions.
Well, with that said, got any more pointers to share while we're on this topic? I mean I understand that they rotate the axles and affect driveline angles as well as steering and suspension geometry. But maybe put caster and like topics in english for me?
You're one of the most knowledgable people on this forum without a doubt. I've looked at the definitions of them before but it didn't really stick. Thanks for any help.
__________________
OME suspension, some JKS stuff, 33x12.50 Goodyear MTR's w/Kevlar, 15x8 Pacer wheels, thedirtworx rear tire carrier
PStov98TJ is offline   Quote Quick Reply
Old 03-08-2013, 10:56 AM   #12
Jeeper
 
Imped's Avatar
 
Join Date: Jan 2011
Location: Indy
Posts: 3,269
Suspension Geometry - JeepForum.com

That's a good starter thread. Just read.
__________________
Daily Driver Rock Rig
IndyORV
Imped is offline   Quote Quick Reply
Old 03-08-2013, 10:59 AM   #13
Jeeper
 
PStov98TJ's Avatar
 
Join Date: Dec 2012
Location: Long Beach, Mississippi
Posts: 2,008
Quote:
Originally Posted by Imped View Post
Suspension Geometry - JeepForum.com

That's a good starter thread. Just read.
Awesome! Thanks man!
__________________
OME suspension, some JKS stuff, 33x12.50 Goodyear MTR's w/Kevlar, 15x8 Pacer wheels, thedirtworx rear tire carrier
PStov98TJ is offline   Quote Quick Reply
Old 03-08-2013, 11:25 AM   #14
MallCrawler

WF Supporting Member
::WF Moderator::
 
kjeeper10's Avatar
 
Join Date: Feb 2011
Location: Connecticut
Posts: 34,151
Good info here

teraflex does a full alignment on a Tj on YouTube.
3 part video. Here is part 1

Check out this video on YouTube:

http://youtu.be/F4ZM7mqb67Q
__________________
2007 Rubicon/Rock Krawler TR 2.5 coils/rear TB/Rancho 9000 31/32XL shocks/Teraflex monster TB/Synergy highsteer,tie rod, ball joints/Hankook MT 315-75-16 on Level 8 ZX's/MC front SB links/Rancho geo brackets & shocks/Fox ATS stabilizer/Adams front DS/Artec front armor w/ Currie upper bushings=Frankinjeep from hell.

Lifting your JK? Read this!!



Click HERE to become a WranglerForum Supporting Member!
kjeeper10 is offline   Quote Quick Reply
Old 03-09-2013, 02:57 PM   #15
Jeeper
 
SEAICE's Avatar
 
Join Date: Aug 2012
Posts: 301
Images: 10
Quote:
Originally Posted by UnlimitedLJ04 View Post
you'll start by extending the lowers. you can also install uppers, but you likely will not adjust the uppers away from stock length.
Thanks. That's what I plan on doing.

SEAICE is offline   Quote Quick Reply
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Jeep Wrangler Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



logo carid shop wrangler parts carid fender flares custom wheels store avs deflectors at carid
» Rates
Get low rates on auto insurance in Canada!

» Network Links
»Jeep Parts
» Featured Product

All times are GMT -5. The time now is 11:57 PM.



Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, and Grand Cherokee are copyrighted and trademarked to Chrysler Motors LLC.
Wranglerforum.com is not in any way associated with the Chrysler Motors LLC