TJ adj. control arm length - JeepForum.com

 
LinkBack Thread Tools
post #1 of 15 Old 05-23-2010, 07:10 PM Thread Starter
champelite210
Registered User
1998 TJ Wrangler 
 
Join Date: Dec 2007
Location: Wheelersburg
Posts: 526
TJ adj. control arm length

I know there is a link on here telling what the lowers and front uppers should be for so much lift but all I could find was one for an XJ. Are they the same? If not any one no where it is or how long they need to be for RE 3.5 springs? Thanks


1998 TJ, 4.0 HO, 5 speed, 3.5" RE Super Flex Adj SA lift, AA SYE, Currie steering, 4.88 Gears, 8.8 Rear with Eaton E-Locker, HP Dana 30 with Detroit locker and chromoly shafts, 36x12.5x15 TSL-SX, TNT Customs front 3.5 fenders, XRC rear crusher corners with 3.5 flare, A to Z rock sliders, PSC steering pump PSC steering Bx, XRC 8000 winch.
champelite210 is offline  
Sponsored Links
Advertisement
 
post #2 of 15 Old 05-24-2010, 04:29 AM
njbowhntr
Registered User
2005 TJ Wrangler 
 
Join Date: Apr 2006
Location: Oxford
Posts: 430
Just crawled out from under jeep.

Uppers = 15 1/2" center bolt to center bolt
Lowers = 17 3/16" " "

The jeep was just aligned by OK4WD in March.

Ron
US Navy 1993-'97

Last edited by njbowhntr; 05-24-2010 at 05:22 AM. Reason: added measurements
njbowhntr is offline  
post #3 of 15 Old 06-18-2010, 09:20 AM Thread Starter
champelite210
Registered User
1998 TJ Wrangler 
 
Join Date: Dec 2007
Location: Wheelersburg
Posts: 526
Found a link that said about 16 1/2 for the lowers at 4" of lift. Is there any problems that occur if you run them any longer. I've heard some talk about the main thing is having the tire centered in the wheel well. Any opinions?

1998 TJ, 4.0 HO, 5 speed, 3.5" RE Super Flex Adj SA lift, AA SYE, Currie steering, 4.88 Gears, 8.8 Rear with Eaton E-Locker, HP Dana 30 with Detroit locker and chromoly shafts, 36x12.5x15 TSL-SX, TNT Customs front 3.5 fenders, XRC rear crusher corners with 3.5 flare, A to Z rock sliders, PSC steering pump PSC steering Bx, XRC 8000 winch.
champelite210 is offline  
post #4 of 15 Old 06-18-2010, 09:37 AM
glockster
Registered User
1997 TJ Wrangler 
 
Join Date: Oct 2006
Location: chino
Posts: 2,113
My RE adj lowers are set at 16" center to center. 1/4" longer than stock. This is also the length of the RE fixed lowers for their 3.5" or 4.5" springs. No real need that I am aware of to go any longer. Currie uses the stock length of 15.75" on their 4" lift and that worked real well on my 97 tj.
glockster is offline  
post #5 of 15 Old 06-18-2010, 09:41 AM
Coils Rule
Registered User
2003 TJ Wrangler 
 
Join Date: Sep 2003
Location: Belfair- Washington
Posts: 801
there all going to be a little diffrent the pinion angle is what is important

Rockcrawlin' is lame.
Coils Rule is offline  
post #6 of 15 Old 06-18-2010, 09:44 AM
JCWJEEP
Registered User
2010 JK Wrangler 
 
Join Date: Feb 2010
Location: LaSalle
Posts: 379
Quote:
Originally Posted by Coils Rule View Post
there all going to be a little diffrent the pinion angle is what is important
This.


Some people extend their lowers out as much as they can get away with to cheat a little extra wheelbase. The uppers will all be different to accurately set your pinion angle.

JC Whitney Jeep Team
JCWJEEP is offline  
post #7 of 15 Old 06-18-2010, 09:44 AM
lumpster
Web Wheeler
 
lumpster's Avatar
2012 JK Wrangler 
 
Join Date: Jul 2008
Location: kansas City MO
Posts: 4,736
Garage
The most important thing about control arm length is making sure everything clears. You have to check it at full compression also, not just ride height. If you only drive it on the street you may get away with centering the wheel in the wheel opening, but not if you take it offroad much.
lumpster is offline  
post #8 of 15 Old 06-18-2010, 09:51 AM
Coils Rule
Registered User
2003 TJ Wrangler 
 
Join Date: Sep 2003
Location: Belfair- Washington
Posts: 801
I should have elborated a little. Your not trying to point the pinion at the output shaft like you would with your rear end you want to "flatten out" you pinion angle to get the correct caster/camber. Looking at mine by eye ball it is almost level maybe even slightly down.

Rockcrawlin' is lame.
Coils Rule is offline  
post #9 of 15 Old 06-18-2010, 09:59 AM
06WranglerX
Registered User
2006 TJ Wrangler 
 
Join Date: Apr 2006
Location: Frelinghuysen
Posts: 1,931
I am re setting my lowers/uppers soon, and I was going to set the lowers at 15 3/4 mabe 16, then the uppers too 13 1/2. Most likely I will not used exactly 13 1/2 for my uppers since my main focus is just getting the pinion angle back in alignment. If i were you I set the lowers to 16, and then just focus on getting the pinion angle correct, just make sure you stay within the boundaries of the control arms and how far they can be adjusted.

Quote:
Originally Posted by lumpster View Post
he made it clear when he said he was. He didnt ask for a photo ID of you did he.

People need to be a little more trusting, Its not like we are on a convict and rapist forum.
Quote:
Originally Posted by mrblaine View Post
Upon further reflection I've decided I've had enough of this BS and you are now on my ignore list.

06 Red Wrangler X 6 speed hard top
Ford 8.8 Detroit locked, 4 inches of lift, 33 inch BFG KM2's and some other stuff.
06WranglerX is offline  
post #10 of 15 Old 06-18-2010, 11:38 AM Thread Starter
champelite210
Registered User
1998 TJ Wrangler 
 
Join Date: Dec 2007
Location: Wheelersburg
Posts: 526
Well the 1st reply I got said 17.5 which I thought was a little much unless he's comp cut or has extended wheel well openings. I'm gonna set it up for about 16 1/2 and see how everything clears. Thanks for the replys. Once I get this done I'm gonna submit it for Tj of the month. It's gonna be sweet. It's based of of Redlyners rig.

1998 TJ, 4.0 HO, 5 speed, 3.5" RE Super Flex Adj SA lift, AA SYE, Currie steering, 4.88 Gears, 8.8 Rear with Eaton E-Locker, HP Dana 30 with Detroit locker and chromoly shafts, 36x12.5x15 TSL-SX, TNT Customs front 3.5 fenders, XRC rear crusher corners with 3.5 flare, A to Z rock sliders, PSC steering pump PSC steering Bx, XRC 8000 winch.
champelite210 is offline  
post #11 of 15 Old 06-18-2010, 11:56 AM
Wheelin98TJ
JEEP FREAK
 
Wheelin98TJ's Avatar
1998 TJ Wrangler 
 
Join Date: Apr 2004
Posts: 26,036
16.5" might be a bit long.

Especially in the rear with your 8.8 axle.

You will likely run in to clearance issues with the diff cover and the gas tank skid.
Wheelin98TJ is offline  
post #12 of 15 Old 06-18-2010, 12:32 PM
LDO
Registered User
2007 JK Wrangler 
 
Join Date: Jun 2008
Location: San Diego
Posts: 172
I was told from Rusty's with their adj lowers and my 3" lift the front should be set to 16.5
LDO is offline  
post #13 of 15 Old 06-18-2010, 02:04 PM
Imped
Registered User
2004 TJ Wrangler 
 
Join Date: Feb 2008
Location: Indianapolis
Posts: 20,294
There isn't any EXACT length. You need to know enough about your constraints to set the arms correctly for your setup. Ideally, you want to maximize wheelbase while preventing contact anywhere @ full bump all while running proper pinion/caster angles. It can come down to a game of fractions of an inch. If you don't care and just want to set the arms and go, set the lowers @ 16", maybe a hair more and set the uppers for pinion angle in the rear and find a good mix of pinion/caster up front.

OlllllllO
Float Test Build
IndyORV
Imped is offline  
post #14 of 15 Old 03-07-2011, 08:53 AM
epeck87
Registered User
2000 TJ Wrangler 
 
Join Date: Nov 2008
Location: Baltimore
Posts: 1,018
i have 4" suspension lift and my lowers are at 16 which is perfect for me. the uppers will vary for caster/pinion angle like most others have already said

Associates Degree in automotive technology
A1-A8 ASE MASTER CERTIFIED TOYOTA MECHANIC
epeck87 is offline  
post #15 of 15 Old 03-07-2011, 10:57 AM
Imped
Registered User
2004 TJ Wrangler 
 
Join Date: Feb 2008
Location: Indianapolis
Posts: 20,294
Quote:
Originally Posted by epeck87 View Post
i have 4" suspension lift and my lowers are at 16 which is perfect for me. the uppers will vary for caster/pinion angle like most others have already said
Because I'm sure, 9 months later, he was still trying to figure this out.

OlllllllO
Float Test Build
IndyORV
Imped is offline  
Reply

Tags
control , control arm , length

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.



Email Address:
OR

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Jeep Forums Replies Last Post
Control arm length? white305 TJ Wrangler Technical Forum 6 02-01-2010 09:18 AM
control arm length Easton04 TJ Wrangler Technical Forum 10 10-23-2008 11:44 AM
Control arm length ? piperpilot3tk TJ Wrangler Technical Forum 0 03-16-2008 04:00 PM
Control arm length Turner-2000TJ TJ Wrangler Technical Forum 2 07-17-2006 10:59 AM
Control Arm Length ovk TJ Wrangler Technical Forum 3 10-06-2003 09:32 PM

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 On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome