another lift question thread - JeepForum.com

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post #1 of 19 Old 07-03-2013, 05:03 PM Thread Starter
unabashedpraise
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another lift question thread

Stock rear suspension, New extended length shocks for 2"lift.

I have, supposedly, Rancho brand springs that Iput in the rear that gave it 2" of lift, pucks up front. The zj was level, but now with some of the stuff I've installed in the back, its sitting an inch lower than the front, and that is without adding any camping gear.

What options do I have to level it without changing any other suspension stuff? I know I need a new track bar, but was wanting to wait till next year.

I do have some 1.75" pucks sitting in the garage, but don't want to throw everything out of synch if I install them.


1998 Grand Cherokee Limited; 5.2 L, 249

Help: Rear left lock doesn't lock using power locks, but will unlock. Any ideas?


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post #2 of 19 Old 07-03-2013, 05:50 PM
98ZJLTD
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How much weight do you have in the back before as is? Unless you are hauling around a ridiculous amount of weight on a regular you shouldn't have any sagging. Though I see you said they are supposedly rancho springs, are you sure they are for a zj?

98 ZJ Limited- NP231 swap, IRO 4.5 inch Springs, Hydro Shocks, IRO adjustable double shear track bar, JKS quick discos 33x12.50 Kumho Road Venture MT on 15x8 D windows with 3.75 inch BS

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post #3 of 19 Old 07-03-2013, 06:06 PM Thread Starter
unabashedpraise
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I have about 100#s worth of drawers and contents in the back and a spare tire carrier and fuel can attached to the hitch.

1998 Grand Cherokee Limited; 5.2 L, 249

Help: Rear left lock doesn't lock using power locks, but will unlock. Any ideas?


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post #4 of 19 Old 07-03-2013, 06:08 PM Thread Starter
unabashedpraise
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These were added after the lift.

1998 Grand Cherokee Limited; 5.2 L, 249

Help: Rear left lock doesn't lock using power locks, but will unlock. Any ideas?


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post #5 of 19 Old 07-03-2013, 06:19 PM
riot1987
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Stock rear suspension and Rancho rear springs?

Add those spacers you have in the rear. Or you could double up your spring isolators, Itll give you a little bit.


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post #6 of 19 Old 07-03-2013, 06:32 PM Thread Starter
unabashedpraise
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Sorry, I meant the control arms, track bar, sway bar, sway bar links stock.

1998 Grand Cherokee Limited; 5.2 L, 249

Help: Rear left lock doesn't lock using power locks, but will unlock. Any ideas?


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post #7 of 19 Old 07-03-2013, 06:40 PM
98ZJLTD
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You could try and add those spacers and see if it gets you where you wanna be when you're fully loaded, but you might need to look into getting a stiffer rear spring set up. Maybe put some V8 front coils in the rear?

98 ZJ Limited- NP231 swap, IRO 4.5 inch Springs, Hydro Shocks, IRO adjustable double shear track bar, JKS quick discos 33x12.50 Kumho Road Venture MT on 15x8 D windows with 3.75 inch BS

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post #8 of 19 Old 07-04-2013, 02:26 AM Thread Starter
unabashedpraise
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does anyone think I would then REQUIRE a new track bar and long arms if I went up to ~3.5"?

1998 Grand Cherokee Limited; 5.2 L, 249

Help: Rear left lock doesn't lock using power locks, but will unlock. Any ideas?


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post #9 of 19 Old 07-04-2013, 08:11 AM
riot1987
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Track bar, yes.

Long arms, no. They are not needed at 3.5"


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post #10 of 19 Old 07-04-2013, 10:21 AM
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^^^^ this

You definitely want the new track bars so your axle is centered under the jeep, and you will be ok with the stock CA's. I'm at 4.5 inches with stock CA's right now without any real issues. The CA's catch the axle at full droop and there's not much caster adjustment with them, but they work for now.

98 ZJ Limited- NP231 swap, IRO 4.5 inch Springs, Hydro Shocks, IRO adjustable double shear track bar, JKS quick discos 33x12.50 Kumho Road Venture MT on 15x8 D windows with 3.75 inch BS

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post #11 of 19 Old 07-04-2013, 12:45 PM
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I would suggest La's at 5" or above. Anything under that can be done with short arms. That doesnt mean stock arms though, I wouldnt go over 3" on stock ca's personally but its been done.


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post #12 of 19 Old 07-04-2013, 12:54 PM
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Its definitely"doable" but adjustable CA's are the way to go for sure, I can't wait to get adjustables.

98 ZJ Limited- NP231 swap, IRO 4.5 inch Springs, Hydro Shocks, IRO adjustable double shear track bar, JKS quick discos 33x12.50 Kumho Road Venture MT on 15x8 D windows with 3.75 inch BS

My build thread-
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post #13 of 19 Old 07-04-2013, 04:09 PM Thread Starter
unabashedpraise
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I may sound like a complete idiot here, but I'd like to see if I am understanding everything so far.

ok using easy numbers, a 2" lift plus adding heavy stuff nets me 1.5" lift. I would imagine the suspension geometry functions as a 1.5" lift on the flats, but as a 2" lift off road because of axle travel up and down. Is that correct?

Reason I ask is if I add an inch, it brings me BACK to around 2" higher than stock, but the actual lift would be a 3" lift. It would then require a new track bar to re-center the axle because the 3" lift pushed it further than the 2" lift. Whereas with the 2" lift the off center axle is "excusable".

Am I making sense?

Side note-Could I remove the oem spring spacer and add the after market for a little over 1" gain?

1998 Grand Cherokee Limited; 5.2 L, 249

Help: Rear left lock doesn't lock using power locks, but will unlock. Any ideas?


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post #14 of 19 Old 07-05-2013, 01:26 AM
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Quote:
Originally Posted by unabashedpraise View Post
I may sound like a complete idiot here, but I'd like to see if I am understanding everything so far.

ok using easy numbers, a 2" lift plus adding heavy stuff nets me 1.5" lift. I would imagine the suspension geometry functions as a 1.5" lift on the flats, but as a 2" lift off road because of axle travel up and down. Is that correct?

Reason I ask is if I add an inch, it brings me BACK to around 2" higher than stock, but the actual lift would be a 3" lift. It would then require a new track bar to re-center the axle because the 3" lift pushed it further than the 2" lift. Whereas with the 2" lift the off center axle is "excusable".

Am I making sense?

Side note-Could I remove the oem spring spacer and add the after market for a little over 1" gain?
Your suspension will function the same on the trail as it does on the road. Your downward travel is the same weather you're weighted or not, it might ride a little different weighted however the over all function remains unchanged. You should really get an adjustable front and a longer fixed rear track bar (not the drop brackets) with any lift just to keep your axles centered regardless to how much lift you do. It just becomes more obvious that your axles aren't centered and the risk for death wobble due to track bar issues increases the higher you go. I'm not sure if you remove the coil isolators when you do a BB or not but I would say you probably leave those in when you put the coil spacers in. If you spend 10 min or so searching the how to on doing a BB you would be able to find that answer.

98 ZJ Limited- NP231 swap, IRO 4.5 inch Springs, Hydro Shocks, IRO adjustable double shear track bar, JKS quick discos 33x12.50 Kumho Road Venture MT on 15x8 D windows with 3.75 inch BS

My build thread-
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post #15 of 19 Old 07-05-2013, 09:18 AM
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