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Old 12-01-2013, 12:42 AM   #1
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What is a Grade 8 bolt kit?

Saw this mentioned in a first mods forum and it was listed as a good idea for a first mod. Just curious..........what is it?


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Old 12-01-2013, 01:23 AM   #2
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A kit that replaces control arm and trackbar bolts with slightly larger grade 8 or 9 bolts. For example, stock trackbar bolt (14mm class 10.9) replaced with a 9/16 grade 8 or 9.
Provides better fitment that prevents the bolt hole from ovaling out and more strength (more if grade 9).

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Old 12-01-2013, 01:35 AM   #3
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Thanks man!
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Old 12-01-2013, 04:28 AM   #4
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Quote:
Originally Posted by gsn View Post
A kit that replaces control arm and trackbar bolts with slightly larger grade 8 or 9 bolts. For example, stock trackbar bolt (14mm class 10.9) replaced with a 9/16 grade 8 or 9. Provides better fitment that prevents the bolt hole from ovaling out and more strength (more if grade 9).
Also, The new bolts are shouldered whereas the factory are threaded 100%. This keeps the metal bushing sleeves from being chewed up.
Stay with grade 8. Cheaper and are the same strength as the factory 10.9. It's the size/shoulder not the strength you're upgrading. Just remember that.
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Old 12-01-2013, 08:18 AM   #5
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Also, The new bolts are shouldered whereas the factory are threaded 100%. This keeps the metal bushing sleeves from being chewed up.
Stay with grade 8. Cheaper and are the same strength as the factory 10.9. It's the size/shoulder not the strength you're upgrading. Just remember that.

Can someone clear this up for me? Is it all wranglers from 2007-2014 that have this potential bolt issue or just the more recent years?
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Old 12-01-2013, 09:16 AM   #6
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"Can someone clear this up for me? Is it all wranglers from 2007-2014 that have this potential bolt issue or just the more recent years?"

Yes, this affects all JK's. My 2013 came with the smaller 14mm, non shouldered bolts from the factory. I did the bolt upgrade, just to avoid any problems in the future. Not a difficult thing to do, but torquing those bolts to 125 pounds while laying on my back, was not an easy task.
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Old 12-01-2013, 12:28 PM   #7
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Is there a write up or video to show what needs to be done? Pics would be helpful for me.
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Old 12-01-2013, 12:49 PM   #8
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Is there a write up or video to show what needs to be done? Pics would be helpful for me.
Every area on the forum has a "sticky" area for more common and important information. If you're using a app, the sticky area is not seen without clicking it.

Here you go

The Importance of changing out stock bolts!!
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Old 12-01-2013, 03:19 PM   #9
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Thanks, kjeeper10.
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Old 12-01-2013, 03:53 PM   #10
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Quote:
Originally Posted by Gonzos Wrangler View Post
"Can someone clear this up for me? Is it all wranglers from 2007-2014 that have this potential bolt issue or just the more recent years?"

Yes, this affects all JK's. My 2013 came with the smaller 14mm, non shouldered bolts from the factory. I did the bolt upgrade, just to avoid any problems in the future. Not a difficult thing to do, but torquing those bolts to 125 pounds while laying on my back, was not an easy task.

Thanks did you notice any difference in feel with I assume your existing low mileage example 2013?
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Old 12-01-2013, 05:02 PM   #11
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I did the upgrade and yes I do notice some of the "slack" was taken out for example when going over expansion joins in bridges.

It's well worth the small expense in my opinion.

jm.02
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Old 12-01-2013, 10:31 PM   #12
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Who sells the best kit?
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Old 12-01-2013, 10:41 PM   #13
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Old 12-01-2013, 10:42 PM   #14
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One come from Synergy. Can't think of the others. Some people just go buy the bolts from a hardware store.

I was lazy and bought the synergy kit.
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Old 12-02-2013, 01:11 PM   #15
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Thanks
Just ordered the kit
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Old 12-02-2013, 04:05 PM   #16
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I just checked my 2014 and I know the rear has the factory stamped 10.9 bolts,the fronts were hard to read. So I guess I will be ordering a set as well
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Old 12-02-2013, 07:18 PM   #17
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I did the upgrade and yes I do notice some of the "slack" was taken out for example when going over expansion joins in bridges.

It's well worth the small expense in my opinion.

jm.02

Would it help to put some grease on the shoulder of the bolt and in bushing to decrease friction and wear?
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Old 12-02-2013, 07:53 PM   #18
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Thanks and placed my order. Cyber monday free shipping and no tax.
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Old 12-02-2013, 10:41 PM   #19
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Thanks and placed my order. Cyber monday free shipping and no tax.
Thank you, I also placed my order and took advantage of the free shipping and no tax.
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Old 12-03-2013, 09:58 AM   #20
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Mine only had 500 miles when I did this upgrade, so I didn't feel any change. As long as the factory bolts are tight to specs, they should be okay. Only if they get loose they could wiggle inside the bearings or the brackets. This is when problems could occur, reason why it is important to re-torque them every once in a while.
I used the Northridge kit. It doesn't include bolts for the upper control arms, but those are not under the same stress as the lower arms, so not as important. (You can use the Synergy site bolt kit instructions for the bolts included in the Northridge kit).
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Old 12-03-2013, 08:33 PM   #21
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I did this but just bought the bolts, nuts and washers at Tractor Supply. Regardless where you get the hardware, well worth the effort.
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Old 12-05-2013, 09:28 PM   #22
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are there instructions with the bolt kit
got it today
no instructions
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Old 12-05-2013, 10:34 PM   #23
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are there instructions with the bolt kit
got it today
no instructions
Check the description of the item on the website, it may have the labels for each bolt size and length. But usually, 9/16 x 4" is lower control arm, 9/16 x 3" is trackbar, 9/16 x 3.5" is rear upper control arm and m12 x 85mm is front upper control arms.
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Old 12-05-2013, 10:56 PM   #24
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Gsn Thank you

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