Jk trackbar bolt upgrade. DO IT!!! - JeepForum.com

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post #1 of 20 Old 09-24-2013, 08:25 PM Thread Starter
Nsiavosh90
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Jk trackbar bolt upgrade. DO IT!!!

So for 13$ I went to our local hardware store and picked up x2 9/16 18unf x 3.0 grade 8 shouldered bolts with washers and x2 9/16 18unf stover top lock nuts and I am amazed I haven't done this sooner. Shortly after my 2.5 rubicon express lift and new joints all the way around ( ball joints, drag links, tie rod ends and a rubicon express steering stabilizer) I was still getting massive shakes (and one occurrence of DW) in the steering wheel over bumps. Only a days worth of driving with new trackbar bolts in but what a difference in the feel over bumps. Just wanted to back everyone who has said to do this upgrade on the forum and encourage every jk owner to swap out those 14mm bolts with threads all the way to the head of the bolt.

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post #2 of 20 Old 09-24-2013, 08:55 PM
Mfrancis
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Check this out:

http://www.synergymfg.com/Synergy-Su...t-p-30501.html

Definitely the way I'm heading, and I don't even have a lift on yet. I called 4wd parts when I got home, as it is listed as a vendor of this product, and the guy I spoke to had never even heard of this phenomenon. He's looking into it so he can stock it in the local shop here.

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post #3 of 20 Old 09-24-2013, 10:19 PM
TRAUMAhead
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Rebel and Northridge also have a kit.
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post #4 of 20 Old 09-24-2013, 11:15 PM
brianjw
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Don't forget all of the control arm bolts that are also threaded instead of shouldered. Also don't forget the cam bolt eliminator washers since you have round bolts in square holes on the lower control arms.
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post #5 of 20 Old 09-25-2013, 11:58 AM
HighandLow
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Quote:
Originally Posted by brianjw View Post
Also don't forget the cam bolt eliminator washers since you have round bolts in square holes on the lower control arms.
On the frame side or axle side?

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post #6 of 20 Old 09-25-2013, 05:05 PM
brianjw
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Quote:
Originally Posted by HighandLow

On the frame side or axle side?
The axle side on the front lower control arm has a square cut out, so you could punch out a larger opening and use a cam washer. Without a proper sized washed the bolt can move around in there (of course torque helps keep it there). Either my synergy bolt kit or aev lift came with the proper sized washer, there are also specific washers for them from other sources.
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post #7 of 20 Old 09-25-2013, 06:09 PM
SoK66
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Quote:
Originally Posted by brianjw View Post
Don't forget all of the control arm bolts that are also threaded instead of shouldered. Also don't forget the cam bolt eliminator washers since you have round bolts in square holes on the lower control arms.
This ^^^^ . I replaced all of the factory 14mm threaded bolts with 9/16" shoulered grade 8s, sourced from the local Ace Hardware. However, the Synergy kit is cheaper and a one-stop shop. Whatever, do it and do get the cam bolt eliminators from Synergy, Teraflex, etc.
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post #8 of 20 Old 09-25-2013, 08:37 PM
HighandLow
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Quote:
Originally Posted by brianjw

The axle side on the front lower control arm has a square cut out, so you could punch out a larger opening and use a cam washer. Without a proper sized washed the bolt can move around in there (of course torque helps keep it there). Either my synergy bolt kit or aev lift came with the proper sized washer, there are also specific washers for them from other sources.
Thank you, I'll check that out. My geo correction kit came with sleeves for the frame side bolts and my Northridge upgrade bolt kit did not come with instructions. So obviously I have bolts left over. Replaced track bar bolts on both sides after SS relocation and geo correction. It drives straight and true but I feel a little "click" here and there.

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post #9 of 20 Old 09-25-2013, 08:52 PM
SubAtomicGenius
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If you're buying the whole kit, you're better off going with Synergy's complete kit.
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post #10 of 20 Old 09-29-2013, 01:32 PM
Notchman
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I went with the Northridge 4X4 Jeep JK Grade 8 Hardware Kit and have been very pleased with it. Also, since I live a mile away from them I had them do the install also
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post #11 of 20 Old 09-30-2013, 09:06 AM
Maertz
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these are all a good idea, i have slowly swapped all of them to grade 8 standard. (No more metric) Also dont think grade 5 will work anywhere....it wont. Except on your swaybar...



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post #12 of 20 Old 09-30-2013, 09:12 AM
73azbronco
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I'm curious, is this an all year jeep issues as in JK included? So did jeep make the holes for English thread but buy metric or what ?
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post #13 of 20 Old 10-01-2013, 10:31 AM
SoK66
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Yes, apples to all since '07. Jeep uses 14mm standard bolts (non-shouldered) but the holes are 9/16". Factory torque spec is 125 ft lbs, but in my experience the actual is more like 150 ft lbs or more. Bolts are not only undersize, but thier threads act lika a rat tail file on the bracket holes.
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post #14 of 20 Old 10-01-2013, 02:48 PM
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Would this be noticeable for street driven jeeps as well?
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post #15 of 20 Old 10-01-2013, 03:03 PM
Maertz
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Yes sir there's always lots of force and pressure on that. Try and drive without the front track bar once and see for yourself self. Even just taking it out and steering its pretty crazy how much the front moves.

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