Lift kit installed, side to side difference exaggerated

[Jeep&dogs]

Update:
When I reached out to @Maximus-3 , they contacted me via phone. They had already had conversations with RockKrawler regarding the setup. 2 things they asked me to do.

#1 - Remove the rear sway bar and drive, then measure. The thought was maybe this sway bar was bent/damaged.

#2 Swap the springs left to right, drive, measure again.

My tank is at 3/4 full, which I would consider a good average capacity for most time. I also unloaded all gear from the jeep keeping it bone stock, with hard top installed.

I also took additional measurement points.

#1 The original centerline of wheel to top of fender
#2 Ground to rear portion of factory skid rail
#3 bump stop to bottom of bracket at rear.

All 3 measurements remain 1" higher on the drivers side. This was during each stage of the test.

I am going back to @Maximus-3 to see what the next step is, but my guess is that a taller spring is going to be required on the passenger side to level this out properly.

Just making sure, you loosened all the control arms and torqued then with the weight on the Jeep? Same thing with the track bars?

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[Redbaron73]

Just making sure, you loosened all the control arms and torqued then with the weight on the Jeep? Same thing with the track bars?

For step 1
What i did was drop the 4 bolts holding the swaybar to the body. The control arms remained attached to the swaybar, just loosely.

For step 2, the trackball was attached loosely until under the weight of the jeep fully. Repeat of the above swaybar, but this time the control arms where removed to allow the axle to drop for enough for spring swap. Shocks removed from bottom as well.

Lower control arms loosened in this step and retightened under jeep weight.


Does this sound proper?

 

[Jeep&dogs]

For step 1
What i did was drop the 4 bolts holding the swaybar to the body. The control arms remained attached to the swaybar, just loosely.

For step 2, the trackball was attached loosely until under the weight of the jeep fully. Repeat of the above swaybar, but this time the control arms where removed to allow the axle to drop for enough for spring swap. Shocks removed from bottom as well.

Lower control arms loosened in this step and retightened under jeep weight.


Does this sound proper?

I would loosen all 16 control arm bolts, the 4 bolts on the front and rear track bars, rock the Jeep back and forth with everything loose and then re torque everything to spec.

 

[Redbaron73]

I would loosen all 16 control arm bolts, the 4 bolts on the front and rear track bars, rock the Jeep back and forth with everything loose and then re torque everything to spec.

It does feel like it's in a bind when driving on the rough country roads. Good advice, will do this next.

 

[Redbaron73]

I have been dealing with M3 customer support since this post began. After going thru several remove and reinstall attempts, swapping in replacement shocks, swapping springs side to side, and disconnecting lower/uppper control arms, shaking, etc, nothing resolves it.

M3's last communication was that they are too busy to get with RockKrawler, and wait a few more weeks.

I have done some digging on this issue and have determined that RK springs are most likely the culprit. They designed their springs to be the same for both sides (like the JK). They have not engineered their springs for the JL, just found something that worked and put it out there.

I have had my jeep on a rack for a 4 wheel alignment and the axles are true, so nothing is out of wack with the alignment or LCA/UCA.

I talked at length with several manufacturers, including EVO & Synergy. Both have made it very clear that their shocks are engineered for the JLU, and are side specific front and back. Without being side specific, the weight of the batteries and fuel tank is too much to compensate.

This explains why many that use RK springs are using pads or other spacers to compensate. I don't like that plan, and preferred an engineered solution.

I have ordered the Synergy springs, and will be installing those. That will conclusively determine if the RK springs are the issue or not.

 

[Roky]

I have been dealing with M3 customer support since this post began. After going thru several remove and reinstall attempts, swapping in replacement shocks, swapping springs side to side, and disconnecting lower/uppper control arms, shaking, etc, nothing resolves it.

M3's last communication was that they are too busy to get with RockKrawler, and wait a few more weeks.

I have done some digging on this issue and have determined that RK springs are most likely the culprit. They designed their springs to be the same for both sides (like the JK). They have not engineered their springs for the JL, just found something that worked and put it out there.

I have had my jeep on a rack for a 4 wheel alignment and the axles are true, so nothing is out of wack with the alignment or LCA/UCA.

I talked at length with several manufacturers, including EVO & Synergy. Both have made it very clear that their shocks are engineered for the JLU, and are side specific front and back. Without being side specific, the weight of the batteries and fuel tank is too much to compensate.

This explains why many that use RK springs are using pads or other spacers to compensate. I don't like that plan, and preferred an engineered solution.

I have ordered the Synergy springs, and will be installing those. That will conclusively determine if the RK springs are the issue or not.

The RK springs are not side specific, they use a 1/2” taller rear bottom coil isolator on passenger side . These are included in all their lift kits. The springs are in fact engineered for the JL., they just chose to compensate for the lean with their spring perch rather than make longer springs. If Maximus lift is using RK springs, then they should be including their isolators. This is likely contributing to your problem if your using the factory coil spring isolators.

 

[Redbaron73]

The RK springs are not side specific, they use a 1/2” taller rear bottom coil isolator on passenger side . These are included in all their lift kits. The springs are in fact engineered for the JL., they just chose to compensate for the lean with their spring perch rather than make longer springs. If Maximus lift is using RK springs, then they should be including their isolators. This is likely contributing to your problem if your using the factory coil spring isolators.

According to both M3 and RockKrawler, the pads are to be used on both sides. They are the same pad, and same spring. Nothing side specific. I have been talking with these guys for a while now, and multiple persons have confirmed from both companies.

 

[JimLee]

According to both M3 and RockKrawler, the pads are to be used on both sides. They are the same pad, and same spring. Nothing side specific. I have been talking with these guys for a while now, and multiple persons have confirmed from both companies.

Somebody is full of shit, this is straight out of the RK lift install instructions

" 18) Install the spring seats on the axle. The thick part of the spring seats goes toward the rear of the vehicle. There is a specific driver and passenger side marked by a D and P on the bottom of the spring seats. The passenger side is thicker than the driver side. They key in on the OEM spring pad hole for proper orientation. "

 

[Redbaron73]

Somebody is full of shit, this is straight out of the RK lift install instructions

" 18) Install the spring seats on the axle. The thick part of the spring seats goes toward the rear of the vehicle. There is a specific driver and passenger side marked by a D and P on the bottom of the spring seats. The passenger side is thicker than the driver side. They key in on the OEM spring pad hole for proper orientation. "

What part number do you have? This is crazy

It is beginning to sound like they have no idea what they even sell. Both my rears are same part number.

 

[Zandcwhite]

Sit in the driver's seat and have someone else measure, I bet your difference in height disappears? What condition is your jeep mostly driven in, equally distributed passengers or mostly just the driver? In my case, I'm usually driving and significantly heavier than the wife or she is driving by herself, it is her daily. So many guys over analyze ride height. I'd rather it sit and ride level during the majority of use than sitting in the driveway. Most jl lift springs are around a 185lb spring rate, add 200lb male to the drivers seat and you are looking at somewhere between .5 and .75". It really isn't that important. Still a little crooked, throw the tool bag and ice chest on the high side and the tent and sleeping bags on the low side. These are dynamic vehicles, always changing. Seems like a problem that really isn't a problem?

 

[hoag4147]

According to both M3 and RockKrawler, the pads are to be used on both sides. They are the same pad, and same spring. Nothing side specific. I have been talking with these guys for a while now, and multiple persons have confirmed from both companies.

@Roky is correct. This is straight from the install instructions

 

[JimLee]

What part number do you have? This is crazy

It is beginning to sound like they have no idea what they even sell. Both my rears are same part number.

I'm at work and can't crawl under the Jeep right now in these clothes.

I do remember when I installed my RK lift having to separate the L and R rear coil isolators and my rig sits level. I can try and see later for you but I don't know if I can get the PN without pulling the coils.

 

[hoag4147]

What part number do you have? This is crazy

It is beginning to sound like they have no idea what they even sell. Both my rears are same part number.

Probably already have but have you DM’d RK on here? Not positive how responsive.

 

[JimLee]

https://rockkrawler.com/jl-rear-spring-correction-seats-18-pres-wrangler/

Maybe Maximus chose not to use the RK spring correction pads. You can order them for $20 versus buying new springs. Of course call them first as it says for JL's with standard JL springs.

 

[Roky]

According to both M3 and RockKrawler, the pads are to be used on both sides. They are the same pad, and same spring. Nothing side specific. I have been talking with these guys for a while now, and multiple persons have confirmed from both companies.

That’s correct for the front, they are the same but the rears are side specific.

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