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Old 12-12-2018, 12:02 PM
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Mopar Lift Question: 2 door vs 4 Door

The service advisor at my Jeep dealer says he has a mopar JK 2.5 lift with fox shocks for a 2 door that will fit my JKUS 4 door. Just that the drive shaft wont fit but isnt needed for only 2.5 of lift. Hes overstocked and willing to deal but only for the 2 door kit.

He wants to sell the lift and is willing to make a deal on both the kit + labor. Out the door price about $1,250 ($750 + $500 labor)

So Im asking the experts here. Will the 2 door lift work on a 4 door? Does the price seem ok?

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Old 12-12-2018, 12:32 PM   #2
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I'm sure some more knowledgeable folks will chime in. I pretty sure the only differences between the two are the rear coils and shocks. To be clear the drive shaft is the same for both 2 & 4 doors. This a really good price for the kit and install. If this were me, I would purchase the kit, 2" 4 door rear coils, and geometry correction (do not let them install the cam bolts), either brackets or lower control arms, and have them install that, including the drive shaft. Then I would source the rear shocks at my leisure.

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Old 12-12-2018, 01:02 PM   #3
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Quote:
Originally Posted by PuppyCat View Post
The service advisor at my Jeep dealer says he has a mopar JK 2.5 lift with fox shocks for a 2 door that will fit my JKUS 4 door. Just that the drive shaft wont fit but isnt needed for only 2.5 of lift. Hes overstocked and willing to deal but only for the 2 door kit.

He wants to sell the lift and is willing to make a deal on both the kit + labor. Out the door price about $1,250 ($750 + $500 labor)

So Im asking the experts here. Will the 2 door lift work on a 4 door? Does the price seem ok?
The difference between the 2 door kit and the 4 door kit are the springs and shocks. The springs on a 2 door kit might lift the 4 door just a little but not much. The shock valving is likely different and would be too soft for the added weight of a 4 door.

For reference the springs off a 4 door Rubicon will lift a 2 door about 2 inches. So the reverse is not true.

I would pass, unless someone can verify the shocks are the exact same and then just buy some 1.5" spacers and have them toss them in with all the other parts on install to actually lift it. (driveshaft included)
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Old 12-12-2018, 01:04 PM   #4
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as was stated the front d/s are the same on both 2 dr and 4 dr the rears are diff but those don't come in the kit so not an issue. the front shocks and coils are the same the rears shocks and coils are different. the rear 2 door coils will be a little softer so you might be rear end lower but just have them throw in a 1" rear spacer. shocks will be valved a little diff on back but doubt that under 95% of circumstances you will notice it.
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Old 12-12-2018, 01:35 PM   #5
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Here are the exact differences between the Mopar lifts. It's actually a 2in lift which provides just over 3inches of actual lift. The only thing different are the rear shocks and springs since they are tuned different for the different weights. The Drive shaft is the same for the 2 door and 4 door.





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Old 12-12-2018, 01:54 PM   #6
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I dont believe the shock specs and spring rates will work. The JKU weighs more, quite a bit more. Also, Mopar has a 2 inch lift and a 4 inch. No 2.5 inch lift. Did Mopar add a 2.5 for the JLs maybe?? I have the 2 inch Mopar on my JK and I absolutely luv it! I did go with the Rancho geo brackets and TF adj HD front track bar. About 20k on it so far with zero issues..


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Old 12-12-2018, 01:55 PM   #7
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Mopar Lift Question: 2 door vs 4 Door

Quote:
Originally Posted by 2qik2see View Post
I dont believe the shock specs and spring rates will work. The JKU weighs more, quite a bit more. Also, Mopar has a 2 inch lift and a 4 inch. No 2.5 inch lift. Did Mopar add a 2.5 for the JLs maybe?? I have the 2 inch Mopar on my JK and I absolutely luv it! I did go with the Rancho geo brackets and TF adj HD front track bar. About 20k on it so far with zero issues..


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My post was late for the party..lol..RednRoll & Jadmt gave me outstanding advice on my lift!


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Old 12-12-2018, 02:09 PM
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Originally Posted by rednroll View Post
Here are the exact differences between the Mopar lifts. It's actually a 2in lift which provides just over 3inches of actual lift. The only thing different are the rear shocks and springs since they are tuned different for the different weights. The Drive shaft is the same for the 2 door and 4 door.






Thanks for all the detailed feedback. Since the only difference is rear springs and shocks, would it make sense to source those separately and install those instead of what comes with the 2 door kit? Parts cost for rear springs and fox shocks looks to be about $400. Not sure its really a bargain with the added cost though.
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Old 12-19-2018, 05:43 PM   #9
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I have the front and rear springs for JKU Mopar 2 sitting in the garage. Had them replaced yesterday. I wouldnt recommend them to anyone.

Replaced with Synergy 3/2. Seriously the way to go. Dont waste your money.
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Old 12-19-2018, 05:58 PM   #10
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Originally Posted by El Burro View Post
I have the front and rear springs for JKU Mopar 2 sitting in the garage. Had them replaced yesterday. I wouldnt recommend them to anyone.

Replaced with Synergy 3/2. Seriously the way to go. Dont waste your money.
I have about 15,000 miles on my mopar 2" coils and love them. I have had AEV, RK, and TF and have installed synergy and MC on others so I have a pretty good basis for comparisons.
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Old 12-19-2018, 06:10 PM   #11
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I have about 15,000 miles on my mopar 2" coils and love them. I have had AEV, RK, and TF and have installed synergy and MC on others so I have a pretty good basis for comparisons.
Good for you. I had the opposite experience. The ones I got just a few months ago were junk.
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Old 12-19-2018, 08:33 PM   #12
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If its a 2.5 for a 2dr then it will be a 1.5 lift for a 4dr. Front driveshaft is the same however you dont need a new driveshaft for 2.5 lift.


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Old 12-19-2018, 09:04 PM   #13
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I am now on my third JK/JKU with a Mopar 2" lift: the ride, handling and articulation of my three JKs improved significantly.

I strongly recommend it to anyone looking for a good quality lift.
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Old 12-20-2018, 10:10 AM   #14
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Over 10k on my Mopar Lift with multiple hundreds of miles offroad and still very happy with it.

Question for those who have installed them -
Has anyone measured the free-length (extended) of the Fox Shocks in these kits?
I plum forgot to and I could use those measurements if anyone has them handy..
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Old 12-20-2018, 11:08 AM   #15
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Originally Posted by 2qik2see View Post
The JKU weighs more, quite a bit more.
It's only like 300 lbs or so
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Old 12-20-2018, 11:18 AM   #16
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It's only like 300 lbs or so


I was thinkn closer to 500lbs but still 300lbs adds up esp if you add bumpers, armor, etc..I not sure but I would think the spring rates & shock settings would be higher for a JKU than a JK bc of the 300lbs difference. Definitely in the rear Id think but that may be what I get fer thinkn..


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Old 12-20-2018, 11:45 AM   #17
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4 door recon full tank gas no passengers or gear inside.
2016 JKR same full gas no gear or passengers.

both pretty much same set up ie vr 10 winch and 285/75-17 coopers on stock rims when they were weighed.
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Old 12-20-2018, 08:19 PM   #18
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I was thinkn closer to 500lbs but still 300lbs adds up esp if you add bumpers, armor, etc..I not sure but I would think the spring rates & shock settings would be higher for a JKU than a JK bc of the 300lbs difference. Definitely in the rear I’d think but that may be what I get fer thinkn..


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Looks like it's even less than a 300 lbs difference and closer to 200 lbs

Payload capacity

Sport 1000 lbs (2 Door), 1190 lbs (4 Door)
Sahara 880 lbs (2 Door), 996 lbs (4 Door)
Rubicon 892 lbs (2 Door), 1087 lbs (4 Door)

Stock curb weights

Sport 3879 lbs (2 Door), 4101 lbs (4 Door)
Sahara 4055 lbs (2 Door), 4295 lbs (4 Door)
Rubicon 4132 lbs (2 Door), 4341 lbs (4 Door)
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Old 12-20-2018, 08:58 PM   #19
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Quote:
Originally Posted by SecondTJ View Post
Looks like it's even less than a 300 lbs difference and closer to 200 lbs

Payload capacity

Sport1000 lbs (2 Door), 1190 lbs (4 Door)
Sahara880 lbs (2 Door), 996 lbs (4 Door)
Rubicon892 lbs (2 Door), 1087 lbs (4 Door)

Stock curb weights

Sport3879 lbs (2 Door), 4101 lbs (4 Door)
Sahara4055 lbs (2 Door), 4295 lbs (4 Door)
Rubicon4132 lbs (2 Door), 4341 lbs (4 Door)





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Old 12-20-2018, 10:35 PM   #20
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Quote:
Originally Posted by SecondTJ View Post
Looks like it's even less than a 300 lbs difference and closer to 200 lbs

Payload capacity

Sport 1000 lbs (2 Door), 1190 lbs (4 Door)
Sahara 880 lbs (2 Door), 996 lbs (4 Door)
Rubicon 892 lbs (2 Door), 1087 lbs (4 Door)

Stock curb weights

Sport 3879 lbs (2 Door), 4101 lbs (4 Door)
Sahara 4055 lbs (2 Door), 4295 lbs (4 Door)
Rubicon 4132 lbs (2 Door), 4341 lbs (4 Door)
those are not really accurate. Here is the certificate of origins for the two vehicles I weighed above and you can see the 2 door is supposed to weigh 3982 and it weighs 4500 and the 4 door is supposed to weigh 4315 and it weighs 5050, so while in theory there should be 333lbs difference there really is 550 lbs difference.

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Old 12-20-2018, 10:54 PM   #21
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Good for you. I had the opposite experience. The ones I got just a few months ago were junk.
Thes kits are provided by different suppliers throughout the years and that is why they have the superseded codes after the PN# AA, AB, AC, AD etc.

Right now all 2 Dr. packages are on Back Order as I understand it.
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Old 12-21-2018, 10:00 AM   #22
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those are not really accurate. Here is the certificate of origins for the two vehicles I weighed above and you can see the 2 door is supposed to weigh 3982 and it weighs 4500 and the 4 door is supposed to weigh 4315 and it weighs 5050, so while in theory there should be 333lbs difference there really is 550 lbs difference.
Except those are modified rigs, so you cannot compare them to bone stock factory numbers for accuracy. FCA wouldn't get away with numbers that are off by nearly 20%, that would invalidate all their load limits.

My MSO also shows 4315 (manual trans), I'm guessing the auto weighs slightly more. Only a few major options will noticeably change stock weight like hard/soft top or the steel 10A bumpers.

Add ~150 lbs just for a full tank of gas.
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Old 12-21-2018, 10:16 AM   #23
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Here are a few

Pictures didn't post, this was 4,440

Quote:
Originally Posted by JohnBoyToo View Post
The posted curb weights are probably bone dry without any options and less than real world #'s....

See below for my 14 jk unlimited sport toad
in stock trim weighed at the cat scales
I did have the brake buddy stuff, demco capture plate, and all the tow toys on/in it at the time...

BUT, since then have put on amp steps and wheels and tires and, and, and .....
I'm not getting any skinnier cuz I like dat etouffee too much !

so the JKU's weight has probably gone up, as has mine
After mods 4,840

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Originally Posted by JohnBoyToo View Post
ok - you got me thinking too...
so spent another $10 @ the cat scales after the wheels, tires, and steps were on... but no brake buddy which I would guess is < 50 lbs

with 3/4 tank fuel here tis...

No WONDER the performance seems (and is) a bit lethargic now - 400 lbs more !!! but the wheels and tires are worth it

just goes to show options DO matter.
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Originally Posted by D3kennedy View Post
'15 JKUHR with both tops still on


This is the only bone stock one I could find for a quick search, it's got the iron block 3.8, so subtract 90 lbs for the aluminum 3.6


Quote:
Originally Posted by ronjenx
I weighed mine, and here are the numbers.

Stock 2008 JK Rubicon Unlimited w/automatic transmission, gas tank half full, no occupants inside:

Scales have current calibration, accuracy within 10 lbs.

Left front tire 1200 lbs.
Right front tire 1200 lbs.
Left rear tire 1100 lbs.
Right rear tire 1100 lbs.

Front axle total 2400 lbs.
Rear axle total 2200 lbs.

Total weight 4600 lbs.

Weight distribution:

52% front
48% rear
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Old 12-21-2018, 09:22 PM   #24
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Well you have the choice. You can not believe the experience of all us who you have asked or you can listen to the experience and not be disappointed..

There is a reason that all the 4drs have a different range of heavier factory springs then the 2doors.


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Old 12-31-2018, 10:51 AM   #25
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JL vs JK spring specs

You knew someone would ask eventually, so here goes:


Is there an easy way of comparing JL vs JK spring specs? For example, are their uncompressed lengths about the same?


The reason I ask is there are already JL offerings that were not offered for the JK. There is a 1.5" dual-rate lift for the 2-door JL, so I wonder if this would work on my JK?


Why would I want such a small lift? Handling, stock driveshafts, stock brake lines, maybe even stock shocks, etc.
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Old 12-31-2018, 12:16 PM   #26
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I have 60K miles on my Mopar 2in lift with 35in tires. No complaints at all, still rides great on road, provides what I need for off road. Really the only thing I would consider over it would be a MC Game Changer 3.5in lift but then again, I would need to triple my budget to do so.
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