Engineering wise I just don't think they would build vehicle to lean to one side, a full gas tank only weighs 150lbs max.
I would try this first. It will confirm whether or not the springs are the issue. Which, really, they should be.
But why only the rear passener spring?
I guess we will soon find out!
Well, they do. 90% of the vehicles one the road in the US have only one person weighing ~175# in the driver seat. Cars are aligned and designed for "nominal" applications which is 1/3 loading and one person (driver) in the vehicle.
I don't think the truck comparison is good either. Heavy truck suspension VS a "soft" Jeep one is far from “Apples-to-Apples”.
My bone stock JKUR had ½” lean to the passenger side when full of gas…. The “JK lean” isn’t far from unheard of in fact it is VERY common.
Well, they do. 90% of the vehicles one the road in the US have only one person weighing ~175# in the driver seat. Cars are aligned and designed for "nominal" applications which is 1/3 loading and one person (driver) in the vehicle.
I don't think the truck comparison is good either. Heavy truck suspension VS a "soft" Jeep one is far from “Apples-to-Apples”.
My bone stock JKUR had ½” lean to the passenger side when full of gas…. The “JK lean” isn’t far from unheard of in fact it is VERY common.
This point concerns me too... and you may very well have a bad coil. I will tell you that according to Will at MC the coils are able to go solid and not overcompress. My rear coils have such a firm rate that I have never gotten to my bump stops (2"). I've gotten very close but still never used all the rear travel. (I have carried opposite tires several times.)
I hope you get this figured out. When you have your coils out measure the free length... differences will be a smoking gun.
It was perfectly leveled before I went off roading.
What size bump stop extensions are you running in the rear?
3", metal cloak provided bump stop pads that were in increments of 1", my thought was 4" bump stop on a 3.5 was too much so I went 3" bump stop.
Also, there were no visual indication of bottling out based on inspection of the the bump stop pads.
I had this problem when I installed my EVO coilover kit. I set both rear coilovers with the same amount of preload and the jeep looked level at first. As the shocks and springs broke in and I really flexed it off road, the right rear started sitting about an inch low on level ground regardless of fuel level. I simply rolled in more preload on the right rear shock but I thought this was really weird. When I hit the whoops out in the desert and I'm using the full range of the rear suspension I can feel the additional preload causing a slight kick on the right rear. The lean got exponentially worse as I added gear and passengers even if I loaded evenly. I never tried switching shocks but I plan a trip to the truck stop and I'm going to weigh each corner of the jeep fully loaded for the trail.
In all fairness, the "kick" you are feeling is most likely being caused by your track bar. This is a normal sensation especially when using the full range of the suspension due to the fact that one end of the bar is mounted on the frame (passenger side) and the other to the axle (driver side). A 3-link, triangulated 4-link or even something like the Full-Traction CRC setup will not have this sensation. Now, this is not to say that having to crank down on the passenger side coil to level you out isn't annoying but, it is normal. You might want to contact King and get a heavier spring rate as it will help.
Good to know about the track bar. I am curious to know why the right rear of the jeep would be so much heavier that the driver side. Stepping the right rear king spring up 50 or 100 pounds would probably remove the preload but don't you think running different spring rates on the same axle at speed would make things not good considering the shock valving remains the same?
Good to know about the track bar. I am curious to know why the right rear of the jeep would be so much heavier that the driver side. Stepping the right rear king spring up 50 or 100 pounds would probably remove the preload but don't you think running different spring rates on the same axle at speed would make things not good considering the shock valving remains the same?
Sorry for the thread jack to OP. Nitrogen is equal both sides. I will look into higher spring rate. Heading to truck scales this week to end my curiosity.
Sorry for the confusion, I wasn't suggesting that you run a different spring rate on the passenger side but rather, the same new rate for both sides. The coils that come standard on the bolt on kit is on the soft side and I ended up bumping them up to a heavier rate and that helped a lot and even with the sag. You'll still have to adjust your passenger side to be taller but, it won't be nearly as much as what you're having to do now.
Eddie
Do you happen to know what the rear spring rates are for your setup? Did you also go with a higher rate upper on the fronts? Did you also go with the different slider kit?
I have a heavy 2 door, and am contemplating a coilover setup, but would like to dial in the spring rate setup if at all possible.
TIA.