Unibody repair.

[brent66]

i have a 91 xj that im selling...well the rear unibody is rotted out nothing really there t work with. so im asking whats the best way o fix it? do they sell any weld in parts? any info would help let me know

[limegreentj]

i doubt they do, you'd have a hell of a time welding anything to the unibody/whats left of the unibody. ive never seen anything like that anyway

[OverkillZJ]

My unibody repair:
before: http://www.bigassjeep.com/pics/phoenix/9.24.05.r.jpg

After:

http://www.bigassjeep.com/pics/phoenix/7.16.06.gg.jpg

[limegreentj]

lol...not much unibody left is there?

[OverkillZJ]

EXACTLY! ;)

And the next phase is all tube (rails / floor gone.)

[limegreentj]

when is that goin down??? is there ANY uni left as of now?

[OverkillZJ]

i have a 91 xj that im selling...well the rear unibody is rotted out nothing really there t work with. so im asking whats the best way o fix it? do they sell any weld in parts? any info would help let me know

OK, jokes aside - how bad is it? Are the rails rotting through? (hit them with a hammer, see if it goes through. Seriously.) I've seen some people sleve the whole rail with 4x4" steel box cut in half, and build off of that - but you're essentially building a frame under a unibody.

Some folks fine an XJ destined for the crusher and swap their parts over to that, if its in better condition.

If it's more than floor pans, there's not much to do but replace, or keep welding in until you have a Jeep again.

[OverkillZJ]

when is that goin down??? is there ANY uni left as of now?

I think I'm going to start on it this spring. I'm not setting a deadline, I'll have the Sammy to wheel lightly - but the idea of selling the buggy made me ill, so it's time to bend some tube. I have a pro tools 105HD and Bend Tech Pro - just a matter of getting off my butt and doing it! It'll probably be a 2-3 year project with how much I work, but I like projects....

EDIT: It still has the original unibody under it, with Claytons welded to it (it was the 5th kit he ever made). Firewall too!

[SirFuego]

My unibody repair:
before:

After:


Unibody repair FTW!
Before:
http://i135.photobucket.com/albums/q159/sb406/Jared/th_3-9-09015.jpg (http://s135.photobucket.com/albums/q159/sb406/Jared/?action=view&current=3-9-09015.jpg)

After:
http://i135.photobucket.com/albums/q159/sb406/Jared/th_FinishedCage007.jpg (http://s135.photobucket.com/albums/q159/sb406/Jared/?action=view&current=FinishedCage007.jpg)

Seriously, though. Most unibody repair (at least for the shadetree mechanic) involves welding plate to the good portions of the frame rail to stiffen it up. If it's really bad, some folks cut it out and replace it with box or round tubing tied into the good portion of the frame rail.

[limegreentj]

i getcha...but if it was me, i'd probably do what you and matt did...dedicated trail rig...if you are gonna go through the bullshit of fixing it with patches...just tear it down and tube the bitch...lol

[brent66]

it is real bad alot of it is missing nothing there to hit it with a hammer. really nice rigs by the way and i thought of doing that but im leaving for school in may and my wife dont want it sitting around so it is going to go. but i want to build a yoda for a trail rig only