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Old 03-21-2015, 08:59 PM
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LJ stock coils, how long do they last?

I've got a 2005 LJ with 29k miles on it, I bought it new ten years ago and it (obviously) has sat for years in a garage. I'm fairly certain the stock shocks are shot, as this thing shakes violently from side to side everyting I hit a pothole, but I'm not sure how to assess the state of my coils.

The big picture is here is that I want to do a 2" lift, and I'm trying to decide between several possible scenarios (I could use some help figuring this one out):

1) Keep the ten year old stock coils and do a BB.
2) Get a new set of stock coils and do a BB (if so, where would I find these?)
3) Find on-road designed (I'm never going off road) 2" coils. I'm really struggling to find 2" progressive coils that are intended for city/highway driving.
4) Would JK coils fit, and or work here, and are they the same size as the oem LJ's?

I'm planning on swapping out the stock shocks for Bilstein 5100's, regardless of which scenario I go with (unless someone here has a better street-only recommendation).

So which scenario makes the most sense to you? I really need the help.

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Old 03-21-2015, 09:20 PM   #2
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Quote:
Originally Posted by jason370 View Post
this thing shakes violently from side to side everyting I hit a pothole
When people use phrasing like shaking violently when you hit a pothole, it tends to bring on discussions of death wobble. So it's important to first determine if this is the symptom you're experiencing first, as the fix is completely different than shocks.

When you have this violent shaking, are you at any particular speeds? Do you have to come to a complete, or almost complete stop for the shaking to stop?

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Originally Posted by jason370 View Post
The big picture is here is that I want to do a 2" lift, and I'm trying to decide between several possible scenarios (I could use some help figuring this one out):
This all depends on your budget.

Most people will recommend a suspension lift using taller springs and new shocks. There are many brands that come highly recommended and for a small 2" lift, there's not a lot of extras you need to buy so they tend to be inexpensive in that lift range. BDS Suspensions comes highly recommended.

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Old 03-21-2015, 09:23 PM   #3
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Personally I think your best bet would be to get an aftermarket 2 inch lift kit that comes with new springs and shocks. It would just be easier than monkeying around with other things. Common brands recommended on here are BDS and Old Man Emu. The road characteristics are fine and probably much better than stock.
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Old 03-21-2015, 09:30 PM   #4
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I would stay away from progressive rate coils with an lj, i have an 06 lj and had progressive rate coils springs for about a 2 years, they than sagged and the first three wraps on the coils became bound. An lj has some extra weight that a tj doesn't have, I ended up going to the ome 2" springs. They are the only manufacturer that i could find that makes coils springs specifically for an lj. And they ride great with the 5100 bilstein shocks
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Old 03-21-2015, 09:43 PM
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When people use phrasing like shaking violently when you hit a pothole, it tends to bring on discussions of death wobble. So it's important to first determine if this is the symptom you're experiencing first, as the fix is completely different than shocks.

When you have this violent shaking, are you at any particular speeds? Do you have to come to a complete, or almost complete stop for the shaking to stop?


This all depends on your budget.

Most people will recommend a suspension lift using taller springs and new shocks. There are many brands that come highly recommended and for a small 2" lift, there's not a lot of extras you need to buy so they tend to be inexpensive in that lift range. BDS Suspensions comes highly recommended.
Yes yes, I see your point. I'm nearly certain this is not a DW scenario. I'm talking about city driving at under 10 mph, and usually between 2-5 mph. One tire plummets into a pothole and bam...the entire body rocks back and forth (usually just once) as if two gorillas are shaking it. I literally swing side to side and almost hit my passenger. At highway speeds, everything runs pretty well, no issues.

As far as BDS goes, I have two concerns:

1) From all the reading I've done in the past three weeks in jeep forums (like six hours a day, my gf is about to break up with me) most peple say BDS runs a bit rough on the street.
2) Most lift kit coils seem to be rated for Jeeps which are carrying heavier bumpers and/or winches; I'm running completely stock which means that a 2" lift will likely become 3" (I think). My understanding is that the jump from 2" to 3" is a big one, and will require considerably more work and hardware to get everything right. Considering a only want 2", I'm hoping to avoid this potential headache.

Bear in mind, I know just about zero about any of this, aside from all the reading I've been doing. So this is all theoretical for me at the moment, and I'm very much counting on your guys experience to fill in the gaps here. Pleas do not hesitate to point out where I might be mistaken or misinformed. I'd like to make one good (well informed) decision on this.

Much appreciated!
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Old 03-21-2015, 09:45 PM   #6
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There is a good chance your Jeep's violent shaking is due to bad track bar ends. Do a dry steer test to diagnose worn parts in your steering and suspension before replacing ANY parts.

Dry Steering Test

Do a dry steering test by having someone sit in your Jeep (with the tires on the ground) and continuously turn the steering wheel back and forth from about the 11 to 1 position while you lay under the front end and watch and feel for any lateral play in any steering or suspension joints. Check both track bar ends, the tie rod and drag link ends.
Although rotational movement in the tie rod and drag link is normal and necessary, there should be no end movement at all in the joints. There also should be no movement in the track bar ends.
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Old 03-21-2015, 09:52 PM
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Originally Posted by strumble8 View Post
I would stay away from progressive rate coils with an lj, i have an 06 lj and had progressive rate coils springs for about a 2 years, they than sagged and the first three wraps on the coils became bound. An lj has some extra weight that a tj doesn't have, I ended up going to the ome 2" springs. They are the only manufacturer that i could find that makes coils springs specifically for an lj. And they ride great with the 5100 bilstein shocks
Thanks that's good info. Question for you:

1. Is your LJ stock, or do you have aftermarket equipment on it which adds enough weight that it would effect the lift height? Did you measure how much height your lift got you in reality? i'm concerned 2" will become 3"/ Also, was it 2" in the front and 2 1/2" in the back? did you get the light load version from quadratech? (Old Man Emu 2941 - Old Man Emu Rear Coil Springs for 97-06 Jeep® Wrangler TJ & Unlimited - Quadratec)

2. Are you a street only driver, or are you offroading/rock crawling, etc? I'm strictly city/highway.

3. How many miles a year are you putting on that LJ, and how many miles did you put on those progressive coils? Two years for me is 4000-5000 miles, for most others it's 20-40 thousand miles, massive difference and something to factor in, right?
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Old 03-21-2015, 09:55 PM
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Originally Posted by Water Dog View Post
There is a good chance your Jeep's violent shaking is due to bad track bar ends. Do a dry steer test to diagnose worn parts in your steering and suspension before replacing ANY parts.

Dry Steering Test

Do a dry steering test by having someone sit in your Jeep (with the tires on the ground) and continuously turn the steering wheel back and forth from about the 11 to 1 position while you lay under the front end and watch and feel for any lateral play in any steering or suspension joints. Check both track bar ends, the tie rod and drag link ends.
Although rotational movement in the tie rod and drag link is normal and necessary, there should be no end movement at all in the joints. There also should be no movement in the track bar ends.
That's really interesting! Thanks, Ill do that. Still, I want to lift it 2" no matter what, mainly because I want to put on 32" tires. So my initial question regarding the different scenarios remains important.
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Old 03-21-2015, 10:06 PM   #9
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If I were you, I would go with an OME lift or BDS. If you are still concerned with receiving over 2" of lift from springs, then you can go with coil spacers and just get the bilsteins. Your OEM springs are definitely not worn out after ten years of light driving. I think JK coils could work but may give a little more than 2" since they're heavier (I don't remember exactly).
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Old 03-21-2015, 10:08 PM   #10
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Originally Posted by jason370 View Post

Thanks that's good info. Question for you:

1. Is your LJ stock, or do you have aftermarket equipment on it which adds enough weight that it would effect the lift height? Did you measure how much height your lift got you in reality? i'm concerned 2" will become 3"/ Also, was it 2" in the front and 2 1/2" in the back? did you get the light load version from quadratech? (Old Man Emu 2941 - Old Man Emu Rear Coil Springs for 97-06 Jeep® Wrangler TJ & Unlimited - Quadratec)

2. Are you a street only driver, or are you offroading/rock crawling, etc? I'm strictly city/highway.l

3. How many miles a year are you putting on that LJ, and how many miles did you put on those progressive coils? Two years for me is 4000-5000 miles, for most others it's 20-40 thousand miles, massive difference and something to factor in, right?
My lj is stock with the excpetion of a winch and 31" tires. I used the heavy duty springs front and rear, the front springs put me right at 2" of lift over the original stock height, the rear about 2.5" over stock. The rc 2.5" progressive coils intially gaind about 3" of lift but they settled to than sagged to the point they were almost back to stock height. I went with the heavy duty springs because i do carry 4 adults occasionally and the factory springs really felt to soft for that. I do some light trail riding around colorado, nothing major as far as rockcrawling. I have had my jeep for a little over 2 years and only put 5k miles on it. I drive it sparingly as its a 3rd vehicle.
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Old 03-21-2015, 10:09 PM   #11
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And remember that with an lj you can get away with more lift usually 3-4" before you start having issues with driveline angles etc
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Old 03-21-2015, 10:29 PM
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My lj is stock with the excpetion of a winch and 31" tires. I used the heavy duty springs front and rear, the front springs put me right at 2" of lift over the original stock height, the rear about 2.5" over stock. The rc 2.5" progressive coils intially gaind about 3" of lift but they settled to than sagged to the point they were almost back to stock height. I went with the heavy duty springs because i do carry 4 adults occasionally and the factory springs really felt to soft for that. I do some light trail riding around colorado, nothing major as far as rockcrawling. I have had my jeep for a little over 2 years and only put 5k miles on it. I drive it sparingly as its a 3rd vehicle.
Hmm, I wasn't expecting that answer. My rear seat is out, so obviously I carry no rear passengers, but I do keep a couple toolboxes in there (probably 50 lbs max) Do you think I should go with the light or heavy load? Do you think the light load would ride a bit nicer on city streets? I'm just about sold on OME at this point; literally every person has raved about them and their quality.
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Old 03-21-2015, 10:42 PM   #13
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If you have a hard top get the heavy load springs, if you only have a soft top the medium or light load springs should be fine.
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Old 03-21-2015, 11:12 PM
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If you have a hard top get the heavy load springs, if you only have a soft top the medium or light load springs should be fine.
Roger that.

Ok so I've got the coils covered.

Springs: OME 2" Heavy load (fyi, on QTech, it actually says 1.5"): Old Man Emu 2932 - Old Man Emu Front Coil Springs for 97-06 Jeep® Wrangler TJ & Unlimited - Quadratec)

Shocks: Bilstein 5100's, I should go with the 0"-2" one's, yes? [COLOR="rgb(65, 105, 225)"]Bilstein 24-186810 - BILSTEIN Front 5100 Series Gas Shock Absorber for 97-06 Jeep® Wrangler TJ & Unlimited with 0-2" Lift - Quadratec[/COLOR]

Am I missing anything? Spacers, bump stops, track bar, or am I good to go here? FYI, I'm planning on having my mechanic (who is a jeep rock crawler guy) do the install, and teach me as he goes. I'll try to photo document the whole thing.
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Old 03-21-2015, 11:17 PM   #15
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You're solid. If you don't plan on off-roading and disconnecting, you won't necessarily need bump stops. Track bars are usually for 3"+ lifts. Unless you get bump steer, then you won't need it. Coil spacers + lifted coils = no bueno.
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Old 03-21-2015, 11:24 PM
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You're solid. If you don't plan on off-roading and disconnecting, you won't necessarily need bump stops. Track bars are usually for 3"+ lifts. Unless you get bump steer, then you won't need it. Coil spacers + lifted coils = no bueno.
Awesome. What are your thoughts on a steering stabilizer? At 70+mph, the steering wheel has a very slight shimmy to it, it's really subtle but I was wondering if anyone uses them for highways purposes.
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Old 03-21-2015, 11:30 PM   #17
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Um I don't really know. Do you not have one? I had to replace my 15 year old one a few months ago because it had was leaking. You also could lower your tire pressure a little.
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Old 03-21-2015, 11:33 PM   #18
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Awesome. What are your thoughts on a steering stabilizer? At 70+mph, the steering wheel has a very slight shimmy to it, it's really subtle but I was wondering if anyone uses them for highways purposes.
That's more than likely just an out of balance tire...especially right around that speed.

The steering stabilizer in a Jeep is just a basic shock..nothing fancy or special about any of them out there on the market. Most will recommend any one to put on there...usually an inexpensive once..mostly because they are all the same.
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Old 03-21-2015, 11:38 PM   #19
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I don't know if you have Firestone's out in the city..If you go to NJ though, there are a few not far from the tunnels or GWB. I just bought a lifetime alignment, along with lifetime wheel balancing and rotation for $230 from them. So every 6 months, 6k miles, or whenever needed I can go to any Firestone and they will correct the alignment, rotate and balance the tires for free as long as I own the vehicle, regardless of what tires I have on there too. I'd consider looking into something like that with all the potholes, and sitting in the garage..could get flat spots on the tires from being stationary for so long if you leave it sitting.
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Old 03-21-2015, 11:44 PM
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Thanks guys, this has been incredibly helpful. Pushing my luck a little here (and perhaps this should be a separate thread...in fact, it likely will be), :

Tires/Wheels:
I'm thinking Goodyear Silent Armor's, but sizing is mind bending for me. I just don't quite get the subtle (or perhaps not so subtle differences):

P255/65R17
P255/70R17
P245/75R17
P235/70R17

http://www.tirerack.com/tires/tires....er+SilentArmor

I understand the difference measurements, I just dont know how that translates to ride, stability, handling, etc...especially when comparing different sizes in the same tire, like above. Thoughts here?

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