Installation of a SkyJacker 2.5 lift - Jeep Wrangler Forum

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Old 01-06-2011, 05:43 PM   #1
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Installation of a SkyJacker 2.5 lift

I figured I would document my install in case anyone else wants to see things about a lift and want to try to do it on their own.

This is an install of a SkyJacker 2.5 lift with SkyJacker shocks, new bushings for top of shackles.

This Jeep has 118K on it and never off-road as far as I can tell. Pretty much everything came off withoout any real issue. Jeep is a Texas truck so no rust issues.

The only real gotcha between what is in the insructions and what should have been in them is you need to disconnect the front track bar from the axle to be able to get the U bolts to line up easily. Other than that, it was prety straight forward.

Pics of when I bought it a couple of months ago, bad motor, ugly tires, etc....



Pics of the current 31/10.50 15's next to my 90 Wrangler.



Pic of the front tire distance between fender flare and tire.



Pic of the rear tire distance - this is before the lift



Here is the difference between the old spring and the new one.



Here is the front spring difference



Here is the front tire and flare measurement



Here is the rear measurement.



And here is a pic of the Jeep as of today.



I have pics of the entire install so if anyone wants to see those I can add those to this thread.

I hope this helps others on their install decisions.
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Old 01-06-2011, 06:07 PM   #2
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looking good so far!

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Old 01-07-2011, 05:23 PM   #3
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Thanks!

I am now looking for the cause of a vibration when taking off, like a wobble almost... Only under power, when you let off the pedal it goes away. At 30 and above when you push the pedal no woble.

Thought it may be the transfer case needed to be dropped so I picked up a kit and installed it. No change.

I did not pull the drive shafts so they are in the same position when I started the lift and there wasn't any wobble then.

Anyone have any ideas?

Darnest thing.
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Old 01-07-2011, 06:46 PM   #4
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Great post! please keep them coming! post more pic's!
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Old 01-10-2011, 12:55 AM   #5
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I have a similar issue, stock height though. I'm rolling in a 95 YJ 2.5 I4 on 31" x 10.5" maybe its the HP to tire size vs gear ratio? It's only on take offs, low rpms, and steep hill grades I notice it.
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Old 01-10-2011, 01:03 AM   #6
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but it wasn't there with 31's on before the lift, was it?
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Old 01-10-2011, 01:40 AM   #7
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Did you drop the trans skid? My RE 2-1/2" kit came with a TC drop that basically is puck spacers for the tranny skid plus shims for the rear axle to correct pinion angles. No vibes after the lift.
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Old 01-10-2011, 09:05 AM   #8
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60mg - The 31's were on the Jeep before the lift and no vibrations.

whiteyj - I did a drop on the transfer case, yes. No change at all.
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Old 01-12-2011, 08:56 AM   #9
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So, as I drive the Jeep more I seem to nail down exactly when it is 'shuttering', so to speak.

It is like it is doing it at lower RPMs, almost like it is tranny related, not running gear related. Taking off it isn't as bad as it is when it shifts to 2nd, but you can still feel it when it shifts to third.

What really perplexes me is that this wasn't this way before the lift.

To rule out other things I did the Nutter Bypass yesterday - this Jeep runs smooooth now! So it doesn't seem to be a motor related issue so far, it is more drive line.

Motor mounts are new (put them in with the rebuilt motor), BTW.
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Old 01-12-2011, 08:57 AM   #10
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Quote:
Originally Posted by omniscientgregg View Post
I have a similar issue, stock height though. I'm rolling in a 95 YJ 2.5 I4 on 31" x 10.5" maybe its the HP to tire size vs gear ratio? It's only on take offs, low rpms, and steep hill grades I notice it.
Does it do it in all gears?
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Old 01-12-2011, 03:45 PM   #11
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Post more pics of the install.
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Old 01-12-2011, 03:48 PM   #12
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Quote:
Originally Posted by Firescooby View Post
Post more pics of the install.
X2 on That!
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Old 01-12-2011, 08:48 PM   #13
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What all did you have to do for your lift install? I'm looking into doing a 2.5" lift. Did it require changing brake lines or anything. Or was it simply swapping springs and shocks?
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Old 01-12-2011, 09:28 PM   #14
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Looks good.
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Old 01-13-2011, 10:38 AM   #15
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Quote:
Originally Posted by cgborders View Post
What all did you have to do for your lift install? I'm looking into doing a 2.5" lift. Did it require changing brake lines or anything. Or was it simply swapping springs and shocks?
Nothing other than changing the shocks, springs and bushings was really needed to lift it. Mine was a whole kit so the only thing I had to purchase afterwards was the shackle bushings for the top of the shackles.

I bought a transfercase drop kit to see if that was my problem with the shimmy, but it isn't so a not needed part in the end.
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Old 01-13-2011, 10:49 AM   #16
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Quote:
Originally Posted by Firescooby View Post
Post more pics of the install.
Here is the jeep with 31's before the lift - side shot


Here is the srpings as they arrived.



and here is the complete kit



You just have to remove the shocks and springs then replace. A little more detailed than that but it is pretty easy.





Here is the front spring coming off



And the old front shock





Here is the front spring removed - all that is left is the sway bar and axle

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Old 01-13-2011, 10:52 AM   #17
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Here is the new spring going in



And the new shock







Should the shim be on top of the spring like this?





And since I am a pic whore, I figure I will show you the inside too


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