Bent my rear trac bar - JKowners.com : Jeep Wrangler JK Forum
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  • 1 Post By Biginboca
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post #1 of 14 Old 05-12-2017, 09:33 AM Thread Starter
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Bent my rear trac bar

Hey guys, did some light wheeling yesterday, bent my rear trac bar. Can anyone give me insight as to what can cause this? Im running 3" synergy coils, adjustable arms in the rear, and a aev bracket to move the tracbar up on the axel side. My coils are very bowed, i will add a wedge when i replace the trac bar. Could i have over flexed? Not enough bump stop? Id like to,fix this the correct way.
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post #2 of 14 Old 05-12-2017, 09:39 AM
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Just cut those coil perches off and rotate them back on top of the axle and weld them back on. They are not held on by much of a weld and is a quick job done right. No reason to spend money on wedges.

As far as the track bar it is a strange place to bend, can you stuff it to the frame? If so you need to add some bump stop. Looks like you might have stuffed the rear driver side while drooping the rear passenger side.

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post #3 of 14 Old 05-12-2017, 10:12 AM
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Whats the pinion angle on this axle?
it looks like the entire axle would be a lot happier if the pinion went down about 6 degrees.
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post #4 of 14 Old 05-12-2017, 10:34 AM Thread Starter
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Thats right now with the bent trac bar, i wanna say it was about 6 degrees when,i set it up
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post #5 of 14 Old 05-12-2017, 12:20 PM
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I don't think it's bent. The AEV trackbar that comes with their rear trackbar Bracket comes bent like that lol

It's bent like that to fit around the stock exhaust pipe because their rear bracket raises the mount almost 7"

Here's mine:



From quadratec...

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Last edited by Biginboca; 05-12-2017 at 12:28 PM.
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post #6 of 14 Old 05-12-2017, 12:38 PM Thread Starter
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damn, so it must just be the trac bar smashing the coils then...must have stretched the adjustable arms out too far? damn franken lift.
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post #7 of 14 Old 05-12-2017, 12:46 PM Thread Starter
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so im looking at the adjustable bars out there and most dont have the bend, am i gonna smash my exhaust if i replace the aev bar with a teraflex or RK ??
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post #8 of 14 Old 05-12-2017, 01:25 PM
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Just fix your pinion angle which will in turn (mostly) fix your cool bow also. Then call it a day
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post #9 of 14 Old 05-12-2017, 07:15 PM
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That is the AEV bracket, and I can confirm from first hand experience that the track bar is supposed to look like that on the AEV kit.

It would take a huge event to bend the track bar that much. There's literally no way "light wheeling" could do that. It would take a pretty spectacular impact that you would for sure remember.

Also agree with others that your pinion looks a bit high, and especially with the stock drive shaft the angle doesn't even really matter. Lowering that would be much easier than changing spring perches if you have adjustable control arms (if not, you might as well get some because when your drive shaft blows up you'll need them anyways for a DC shaft).
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post #10 of 14 Old 05-12-2017, 07:48 PM
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Quote:
Originally Posted by elusive View Post
Whats the pinion angle on this axle?
it looks like the entire axle would be a lot happier if the pinion went down about 6 degrees.
Quote:
Originally Posted by hieneken49 View Post
Thats right now with the bent trac bar, i wanna say it was about 6 degrees when,i set it up

FYI, that photo is not indicating your pinion angle. Your gage needs to be on the diff to indicate pinion angle.

Eyeball-o-meter analysis of photo is telling me your pinion needs to be rotated downward.




EDIT: also, the wedges don't do as much as one would assume. thedirtman is handing you golden advice here:

Quote:
Originally Posted by thedirtman View Post
Just cut those coil perches off and rotate them back on top of the axle and weld them back on. They are not held on by much of a weld and is a quick job done right. No reason to spend money on wedges.
EDIT 2: fix yer' fookin' pinion angle first, then determine if you need to fawk with anything else.

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Last edited by ExWrench; 05-12-2017 at 07:55 PM.
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post #11 of 14 Old 05-12-2017, 07:57 PM
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Shorten uppers boom done.


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post #12 of 14 Old 05-14-2017, 08:29 AM Thread Starter
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How much should i lower the angle by? With the angle gage on the flange of the dif it shows 10 degrees

Last edited by hieneken49; 05-14-2017 at 08:32 AM.
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post #13 of 14 Old 05-14-2017, 08:41 AM
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Quote:
Originally Posted by hieneken49 View Post
How much should i lower the angle by? With the angle gage on the flange of the dif it shows 10 degrees
Rear should have the pinion 1-2 degrees below the shaft angle. Right now it's above by a few degrees.

With that stock shaft you can safely go an additional 3-4 degrees beyond that correction if it helps the springs, but if you ever upgrade to a double cardan shaft you could not overshoot the angle like that.
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post #14 of 14 Old 06-05-2017, 02:00 PM Thread Starter
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just wanted to thank everyone for ur input, shortened up the upper arms, put in metacloak wedges and bumpstops, and everything looks golden !

no rubbing and the coils are pretty straight. will try to get pics a lil later
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