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Old 11-09-2019, 09:58 AM
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Mopar stage one 2" front coil part number question

Ok please don't beat me up or flame me for asking the worlds oldest question, but did anyone get 4 solid inches of lift in the front from the Mopar 2" kit?
Maybe I got the wrong springs is what I worry about now.
I did not buy the kit but piece-mealed it because I installed new Bilstein 5100's shortly after buying the Jeep in May. I still had a teeth jarring ride and discovered I had 2" coil spacers a couple of months later.
After putting the new Mopar springs in I have exactly 2" lift in the rear and just over 4" in the front.
I am attaching some pics with my part numbers and measurements.
I have not touched the bolts on the front factory track bar yet, I have a Rancho adjustable coming in Monday and will swap it then. I am wondering if maybe the track bar could have been tightened while it was lifted and not setting at ride height, but if so could that add 2" of lift on it, seems unlikely.

I don't have a winch or aftermarket bumper, but I weigh 175 and when I sit on the front bumper my measurements go down less than an inch, so I don't think that is it either.


I put the Rancho geometry correction brackets on and the steering and handling is really great now, looking forward to the last piece, the adj. front track bar to get my front axle centered and get the thrust angle perfect.


I have a noticeable negative rake now and I am getting some driveline harmonics at highway speeds I didn't have with the coil spacers.



Can anyone confirm is my front coils are in fact the right part number?
Thanks for any input!





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Old 11-09-2019, 10:31 AM
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Pics disappeared, and cannot find a way to edit or even delete original post...
Sorry, typical noob!

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Old 11-09-2019, 10:40 AM
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Figured out the pics, sorry!
Using this thread
https://www.wranglerforum.com/f202/h...t-2049729.html


front post lift is 13 & 11/16" minus stock 9 & 3/8" equals 4 & 5/16" lift
rear post lift is 7" minus stock ~5" equals 2" lift
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Old 11-09-2019, 10:50 AM   #4
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Welcome to the forum. The front springs are correct for both 2 & 4 doors. The rear is correct for 2 door. On my 2015 2 door I got 3 7/8 in front and 2 1/4 out back with the same springs. That's with winch, steel bumpers, and full under aluminum under armor.
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Old 11-09-2019, 10:51 AM
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more pics

Measuring against the front hock comes up with the same math.
Post lift 22 & 13/16" minus stock 18 & 1/2" equals 4 5/16"


It is hard to see the rake in this pic because its on a slight uphill incline.

Real answers I am looking for is if I have the same front coil part numbers as others with the 2" JK kit 77070094 2007-2011, and if so did you get 4 and 1/4" inch of lift?
Thanks for bearing with my threaded post.
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Old 11-09-2019, 10:53 AM   #6
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the 77070096 is correct for the 2" front coils the rears are different than mine but mine is a 4 door.
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Old 11-09-2019, 10:55 AM
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Quote:
Originally Posted by Lee H View Post
Welcome to the forum. The front springs are correct for both 2 & 4 doors. The rear is correct for 2 door. On my 2015 2 door I got 3 7/8 in front and 2 1/4 out back with the same springs. That's with winch, steel bumpers, and full under aluminum under armor.

Thanks Lee, that gives me a little comfort, just worry about the vibrations I can sense and definitely hear now. They are slight, but with only 3 days on the new coils I worry about long term wear.. I have 168k miles, she's no spring chicken anymore.

I guess I will have to go find the heaviest bumper and winch I can now
Woohoo (not), more spending on the Jeep!

Thanks again for confirming, I only was able to find one good looking source, and it's the one I based my order on.
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Old 11-09-2019, 11:02 AM
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the 77070096 is correct for the 2" front coils the rears are different than mine but mine is a 4 door.

jamdt, thank you for verifying as well! I feel better knowing that! I had used the install instructions that a member here updated with the correct part numbers, and I was getting paranoid I had ordered the 4" springs by mistake.
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Old 11-09-2019, 11:05 AM   #9
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Old 11-09-2019, 11:06 AM
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jadmt, sorry I can't type .. very obviously!
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Old 11-09-2019, 11:11 AM   #11
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jadmt, sorry I can't type .. very obviously!
it made sense to me . It will settle a little bit over the next couple of weeks. A heavier bumper and winch will also help smooth out the ride in front.
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Old 11-09-2019, 11:39 AM
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it made sense to me . It will settle a little bit over the next couple of weeks. A heavier bumper and winch will also help smooth out the ride in front.

Good, I'm looking forward to it settling!
I have a laundry list already just since June of what I have bought.. this definitely has not been a turn key ride for me.
Bought it in May and immediately had to replace 3 calipers, all 4 rotors and all 4 brake pads, and the rear brake shoes, the e-brake handle because the cantilever spring broke, bought 4 new shocks.
The Duratracs on it were from 2014 and rode terrible, so I put Ridge Grapplers on it, love those!!

Last Tues and Weds I did the Mopar rear track bracket, rear end links and all the coils to complete the stage one lift (minus Fox shocks).
Did the Rancho Geometry brackets last Thursday, and the front adj sway bar is on its way along with new end links for the front, because one of the rear end links had to be cut off and the other got dogged up too much taking it off..


Oh and I needed both new front bearings, which, wouldn't you know I screwed up the right inner axle seal re-inserting the drive shaft.. because I didn't research the job and see there are plastic guides in there to help you avoid that..
So I leak axle lube on the right now... I have the seals and I am probably doing those on Monday as well, fair weather days are getting hard to come by in Va lately but should be around 60, not going to have many more of those soon..


I hope I am done after Monday and can just enjoy the ride and stop working on it for a while.. as much as I enjoy doing my own work, I do get tired of it sometimes too!!


So now a winch and bumper is on the the to-do list..
I do love this Jeep, at 47 years old its hands down my favorite ride thats for sure, but my bank account is hating it!!!
COL!!

(crying out loud)
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Old 11-09-2019, 12:47 PM   #13
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Mopar stage one 2" front coil part number question

I wonder if you got a 2” 4dr spring set and not a 2” 2dr spring set.
4dr springs are heavier and give more lift on a 2dr.

If the springs you have are MOPAR springs you should be able to search the part numbers on Mopar parts and find the specs.


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Old 11-09-2019, 12:49 PM   #14
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Originally Posted by JTPhoto JK View Post
I wonder if you got a 2” 4dr spring set and not a 2” 2dr spring set.
4dr springs are heavier and give more lift on a 2dr.


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on the mopar 2" the front coils are the same on both 2 door and 4 door and according to his photo he got the correct rear coils.
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Old 11-09-2019, 01:51 PM
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Quote:
Originally Posted by JTPhoto JK View Post
I wonder if you got a 2” 4dr spring set and not a 2” 2dr spring set.
4dr springs are heavier and give more lift on a 2dr.

If the springs you have are MOPAR springs you should be able to search the part numbers on Mopar parts and find the specs.


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JTPhoto, yeah like jadmt said the front coils are the same part #77070096 for JK or JKU though.

I sort of wish now I did have the 4dr rear coils, if the rear was about an inch higher I would be almost level.

I may look into a 1" spacer for the rear, but will give it a little time and add a winch and steel bumper first.

Sort of hoping when I switch out the front track bar Monday I discover this factory one is loaded due to being torqued down when the Jeep was not at ride height, that would be nice if it came down about an inch.. Would go investigate today but I'm going to be taking those bolts out soon enough. I have the 9/16ths correction bolts on the way as well.



The front Upper and Lower control arms are definitely not bound. I loosened all 4 connections for them putting the correction brackets on and they were torqued down at ride height.


I might be making a mountain out of a molehill here, but the negative rake does irk me.
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Old 11-09-2019, 02:54 PM   #16
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are you 100% sure there is still not a small spacer or doubled up on the isolators up front? over 4" is really up there even for stock bumpers.
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Old 11-10-2019, 01:02 AM
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am 99.999% sure there aren't doubled up isolators, thats because I didn't pull them out, they were jammed in there really good on both sides. The springs are both seated properly in the bottom perch notch, that I am certain of.

I had no issue getting the old springs out by hand, but had to go rent spring compressors to get the new ones in, there was absolutely no way possible to get them in otherwise, had to do a lot of compressing. That I didn't expect since they were supposed to be close to the same height in theory (new vs. old+spacer).
I did take a few pics, wish I had got the tape measure out on them.. looks like I might be taking it all back apart soon, will get some measurements if so then.


Might also switch to OME, thats what I had originally planned to use, but at $167 per axle for OME springs the Mopar ones are a better deal at $177 for both axles, and I assumed greater quality as well.
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Old 11-10-2019, 08:57 AM   #18
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on the mopar 2" the front coils are the same on both 2 door and 4 door and according to his photo he got the correct rear coils.


Well that’s just weird. Every other lift kit I have ever used had different springs between 2Dr and 4dr ie RK 4.5” springs for the 4dr list as 5.5” springs for the 2dr. TeraFlex the same 2.5” springs for a 4dr are 3.5” for a 2dr.
I put a 2.5” 4door lift on 2dr and got 4” total lift.


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Old 11-10-2019, 09:58 AM   #19
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of course these are comparing to brand new Recon coils so taller to begin with and no sag. Yours would be shorter to begin with and after that many miles would have some sag.

I installed installed an AEV 2" spacer lift as soon as I got it home and then replaced with he mopar 2" coils shortly thereafter.
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Old 11-10-2019, 10:00 AM   #20
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Well that’s just weird. Every other lift kit I have ever used had different springs between 2Dr and 4dr ie RK 4.5” springs for the 4dr list as 5.5” springs for the 2dr. TeraFlex the same 2.5” springs for a 4dr are 3.5” for a 2dr.
I put a 2.5” 4door lift on 2dr and got 4” total lift.


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yup most are different but not mopar.
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Old 11-10-2019, 11:49 AM   #21
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Originally Posted by JTPhoto JK View Post
Well that’s just weird. Every other lift kit I have ever used had different springs between 2Dr and 4dr ie RK 4.5” springs for the 4dr list as 5.5” springs for the 2dr. TeraFlex the same 2.5” springs for a 4dr are 3.5” for a 2dr.
I put a 2.5” 4door lift on 2dr and got 4” total lift.


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I suspect that's why most 2 doors report extra lift with these springs VS other vendors lifts.
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Old 11-10-2019, 12:27 PM
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I think I'm going to take my grinder with cut off wheel and cut the bottom of them about an inch and a half. See no reason that wouldn't work for what I'm after.
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Old 11-10-2019, 12:36 PM   #23
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I wouldn't. I would either add a heavier bumper or place 100lb bag of cement on the stock bumper and run around for a while to see how they settle. As a last resort you could cut them can't hurt.
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Old 11-10-2019, 01:14 PM
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I wouldn't. I would either add a heavier bumper or place 100lb bag of cement on the stock bumper and run around for a while to see how they settle. As a last resort you could cut them can't hurt.



Thanks for the suggestions but I feel pretty sure if I take just over one entire coil off the bottom it will leave me 8 full spirals, so if I measure twice and cut once correctly that would give an end result of between 2 & 3/4 to 3", still plenty to later add a bumper and winch one day.
I haven't had a dime of income since June.. so I'm already way beyond anything that makes any kind of sense with my spending on this rig!

The thought of another 1k on bumper and winch that I will almost never use just doesn't compute right now.. been trying to force it but just get 404 error every time..

At worst these were $25 a piece, so even if I screw them up it won't be too much I'm out. Will keep this thread updated, tomorrow is looking like game day.
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Old 11-11-2019, 08:34 AM   #25
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Thanks for the suggestions but I feel pretty sure if I take just over one entire coil off the bottom it will leave me 8 full spirals, so if I measure twice and cut once correctly that would give an end result of between 2 & 3/4 to 3", still plenty to later add a bumper and winch one day.
I haven't had a dime of income since June.. so I'm already way beyond anything that makes any kind of sense with my spending on this rig!

The thought of another 1k on bumper and winch that I will almost never use just doesn't compute right now.. been trying to force it but just get 404 error every time..

At worst these were $25 a piece, so even if I screw them up it won't be too much I'm out. Will keep this thread updated, tomorrow is looking like game day.
If you cut your springs, they will be shorter. BUT, they will also be stiffer. And that does not sound like what you want. If the ride is already jarring, making your springs stiffer would probably make that worse.
Maybe you need softer or adjustable shocks. The shocks you have are known for being firm.
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Old 11-11-2019, 10:18 AM   #26
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If you cut your springs, they will be shorter. BUT, they will also be stiffer. And that does not sound like what you want. If the ride is already jarring, making your springs stiffer would probably make that worse.
Maybe you need softer or adjustable shocks. The shocks you have are known for being firm.
Pretty sure they are linear so should not get any stiffer. Could be wrong tho, but in my mind a linear spring should ride the same no matter the length.
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Old 11-11-2019, 10:54 AM   #27
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one other thought, while not as controlled as cutting I know some have done it. Take a torch and heat the bottom two coils red hot to take the spring out. Would need some way of keeping everything else cool so as not to change their rate.
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Old 11-11-2019, 10:57 AM   #28
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Pretty sure they are linear so should not get any stiffer. Could be wrong tho, but in my mind a linear spring should ride the same no matter the length.
It does not matter if they are linear or progressive / multi-rate. If you cut a spring it will get stiffer. The reason is the two things that determine a springs rate are the diameter of the spring wire used to make the spring and the length of the spring wire used. If you increase the diameter the spring is stiffer, but you really can't do that. But if you reduce the length of the spring wire (which you can do by cutting it) the spring will be stiffer. Think of a coil spring, it is coiled up to fit in the space allowed but really it is a length of spring wire with a given rate. That rate is determined by those two properties, the diameter and the length. A longer piece of spring wire will have a softer rate than a shorter length of the same diameter spring wire. That is because the amount of deflection is per a given length a spring wire, and a longer spring wire has more of a given length. Think of a pencil. A full length pencil has a certain amount of give. But as the pencil gets shorter it has less give. The flexibility of the wood the pencil is made of didn't change. It is just that there is less length of that wood.
We used to use this basic technique racing motorcycles. We would cut out a length of front spring and replace that length we cut out with a spacer the same length as the section we cut out. Cutting the spring made it stiffer (we wanted stiffer springs for racing) and replacing the section we cut out with a spacer retained the ride height (we were road racing and weren't trying to lower the motorcycle as that would cost ground clearance).
So, cutting your springs makes them shorter and it makes them stiffer. If that is what you want, do it. Just try to avoid imparting excessive heat while cutting. But it does not sound like the OP wants stiffer springs. And that is what he will get if he cuts them. You can't avoid it.
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Old 11-11-2019, 11:02 AM   #29
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Originally Posted by jadmt View Post
one other thought, while not as controlled as cutting I know some have done it. Take a torch and heat the bottom two coils red hot to take the spring out. Would need some way of keeping everything else cool so as not to change their rate.
Anything you do that reduces the effective length of the spring wire in the spring will make the spring stiffer.
You can also use a what NASCAR calls a spring rubber, it does the same basic thing. It makes the usable length of the coil spring wire shorter, by taking a coil of the spring wire out of the usable length of spring wire, and thus the spring is stiffer.
But that seems to be going in the wrong direction.
Unless the ride is poor not because the springs are too stiff but because the spring is too soft and it bottoms the suspension.
Perhaps what the OP needs is better shocks.
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Old 11-11-2019, 11:27 AM   #30
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I think the OP just wants to lower the front end. His bone jarring ride was when he had spacers is what I am reading. The new coils just lifted his front too much.
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