Post Zone 4.25" lift question regarding rear shock downtravel - JeepForum.com
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post #1 of 14 Old 08-20-2017, 12:01 PM Thread Starter
Civeng1741
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Post Zone 4.25" lift question regarding rear shock downtravel

Yesterday I installed the zone 3" suspension lift and 1.25" body lift combo. Here is a picture of my rear shocks installed sitting on relatively flat ground. As you can see there is only about an inch or two of downtravel before it bottoms out. It doesn't really make sense to me unless im missing something about hydroshocks vs the previous shocks I had. I also included a picture of the front which looks like it has plenty of space to move up and down compared to the rear. Did zone give me the wrong shocks? Is the ford 8.88 making it sit higher? I know the shocks are the right length because I compared it to the shock length +3" budge boost spacers that were on there before and they matched up in height. Any suggestions?

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post #2 of 14 Old 08-20-2017, 12:39 PM
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My Zone lifts had all the shocks about equal to your front ones.

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post #3 of 14 Old 08-20-2017, 01:20 PM
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Can you post a pic showing the lower shock mount?
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post #4 of 14 Old 08-20-2017, 01:27 PM Thread Starter
Civeng1741
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Can you post a pic showing the lower shock mount?
Here you go

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post #5 of 14 Old 08-20-2017, 03:07 PM
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It looks like your rear axle end shock mounts sit up higher by a few inches on your 8.8 than they do on a stock tj axle, likely for clearance. I'm guessing that's your issue. And you don't have a problem with downtravel, the uptravel is limited here
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post #6 of 14 Old 08-20-2017, 03:16 PM
jski701
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Zone 3" rear shock.... looks like you have issues


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post #7 of 14 Old 08-20-2017, 03:17 PM
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That's on a d35 rear


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post #8 of 14 Old 08-20-2017, 03:20 PM Thread Starter
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Originally Posted by Mattific View Post
It looks like your rear axle end shock mounts sit up higher by a few inches on your 8.8 than they do on a stock tj axle, likely for clearance. I'm guessing that's your issue. And you don't have a problem with downtravel, the uptravel is limited here
I see, there dabs 35 mounts do look shorter, how do I find what kind of shocks for nicely for the height I have?

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post #9 of 14 Old 08-20-2017, 03:27 PM
Mattific
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Post Zone 4.25" lift question regarding rear shock downtravel

You'll want to measure and find the length that will best fit it. Pretty much you'll remove the shocks and disconnect the sway bar and flex one side of the axle so the bump stop hits. Then you'll measure between the shock mounting points (where the shock eye would be) for the compressed length. And measure the same thing only for when the axle is drooping to get the extended length

I'm sure there's other threads that explain it better than me
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post #10 of 14 Old 08-20-2017, 04:17 PM
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Quote:
Originally Posted by Mattific View Post
You'll want to measure and find the length that will best fit it. Pretty much you'll remove the shocks and disconnect the sway bar and flex one side of the axle so the bump stop hits. Then you'll measure between the shock mounting points (where the shock eye would be) for the compressed length. And measure the same thing only for when the axle is drooping to get the extended length

I'm sure there's other threads that explain it better than me
You only measure shocks at full stuff and full droop. Articulation will only tell you if you have a problem which would be very rare with most shock locations. The only way you could get articulation to tell the whole story is if the upper and lower shock mounts were in the same front to back and side to side plane as the spring perches.

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post #11 of 14 Old 08-20-2017, 04:20 PM
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You only measure shocks at full stuff and full droop. Articulation will only tell you if you have a problem which would be very rare with most shock locations. The only way you could get articulation to tell the whole story is if the upper and lower shock mounts were in the same front to back and side to side plane as the spring perches.


So basically the geometry will give different values at full stuff/droop compared to articulation?
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post #12 of 14 Old 08-20-2017, 05:02 PM
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So basically the geometry will give different values at full stuff/droop compared to articulation?
When we outboard shocks, we move both mounts. (not that it matters) We leave about 3/4" of shock shaft showing when the Currie Bump stops just touch at full stuff. Under articulation, the shock will bottom out. But, if you think about it, the only time the shock will be doing that is at very low speed with opposite corners stuffed so the dynamic forces that could damage the shock are very low. If you hit the shock under articulation hard enough that you could damage it, you've got a bunch more other things to worry about, like keeping it on all 4 tires.
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post #13 of 14 Old 08-20-2017, 10:26 PM Thread Starter
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I ended up reinstalling the OEM shocks. Center to top of the shock mounts is about 16". OEM shocks work better than the zone shocks for now since collapsed was 12" vs 15" for the zone. Im now pretty sure that the 8.8 was installed to fit the OEM shocks length with the 3" budget boost.

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post #14 of 14 Old 08-21-2017, 08:32 AM
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Quote:
Originally Posted by Civeng1741 View Post
I ended up reinstalling the OEM shocks. Center to top of the shock mounts is about 16". OEM shocks work better than the zone shocks for now since collapsed was 12" vs 15" for the zone. Im now pretty sure that the 8.8 was installed to fit the OEM shocks length with the 3" budget boost.

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Tell Zone the shocks are the wrong length for your setup and they'll send you the correct length ones. I did.

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