Axle to frame alignment - Jeep Wrangler Forum
Jeep Wrangler Forum

Go Back   Jeep Wrangler Forum > JK Jeep Wrangler Forum > JK 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 01-23-2016, 12:43 AM
Thread Starter
  #1
Guest
 
Join Date: Feb 2015
Posts: 669
Axle to frame alignment

Does anyone have the "approved" FCA procedure for centering the diff's to the frame of the JKU?

I can come up with a few ways to do this but would like to know the proper way of setting the diff in the center of the frame

767282 is offline   Quote
Old 01-23-2016, 03:24 AM   #2
Jeeper
 
Potatohead's Avatar
 
Join Date: Nov 2014
Location: Vancouver
Posts: 1,093
I doubt they do anything like that, it's all engineered with control arm mount locations etc and they just bolt it all together on the line.

Potatohead is offline   Quote
Old 01-23-2016, 09:29 AM   #3
Jeeper
 
Join Date: Jul 2015
Posts: 227
Assuming you have adjustable track bars, centering the axles under the frame is fairly easy. Just measure from several points on the frame to the inside or outside edge of the tires on both sides and adjust track bar until the measurements from side to side are equal. Without adjustable track bars, obviously, this is not possible. Instead, just as when they built it, you get what you get within the build and assembly tolerances.
Meta is offline   Quote
Sponsored Links
Advertisement
 
Old 01-23-2016, 03:24 PM
Thread Starter
  #4
Guest
 
Join Date: Feb 2015
Posts: 669
Quote:
Originally Posted by Meta View Post
Assuming you have adjustable track bars, centering the axles under the frame is fairly easy. Just measure from several points on the frame to the inside or outside edge of the tires on both sides and adjust track bar until the measurements from side to side are equal. Without adjustable track bars, obviously, this is not possible. Instead, just as when they built it, you get what you get within the build and assembly tolerances.
pretty much as I expected.. and yes I do... just had the rig aligned at a shop and was told it was perfect front to rear and square but the left side is noticeably outside the fender and the right is even..
so now I have to get it in center..
I am going to do exactly what you suggest was just wondering if any front end techs were on here and knew ...

true they just bolt things on at the factory but they all have to be checked simply because there are variations in everything..
767282 is offline   Quote
Old 01-23-2016, 04:55 PM   #5
Jeeper
 
Join Date: Jul 2015
Posts: 227
Another consideration, if you have adjustable control arms, is getting your axles squared up with the frame and parralel with each other. This involves measuring the distances from the left and right side of the axles to common points on the left and right. Asjust control arms to square it up. This should have been done when the lift was installed, if you have adjustable control arms, but most don't go to the trouble and simply set the arms to equal lengths, left and right. This puts the arms in a slight bind, and can leave the axle out of square. The fact is that the factory builds within a certain tolerance when they assemble and weld up your frame, but this is rarely perfectly square. Adjusting the control arms to square the axles up is how it should be done with aftermarket control arms. You'd be surprised how much "out" of square the axles can be but still within tolerances of factory.
Meta is offline   Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not 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






All times are GMT -5. The time now is 09:17 AM.


Powered by vBulletin® Version 3.8.8
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.1
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2020 DragonByte Technologies Ltd.

Jeep®, Wrangler, Liberty, Wagoneer, Cherokee, Gladiator, Mopar and Grand Cherokee are copyrighted and trademarked to FCA US LLC.
Wranglerforum.com is not in any way associated with FCA US LLC.