Post-suspension refresh results - uneven on one side

[bob98sr5]

Gents,

Hope everyone is doing well and enjoying your weekend. Looking for some answers on why my suspension is so unlevel on all corners after rehauling all my suspension parts. To start, here's some stats:

1998 4Runner SR5 V6 4WD. Refreshed with the following parts:

• OME 880 w/ Bilstein 4600. Used KYB top hat w/ OEM top bushing
• JBA Offroad UCAs
• New end links and outer tie rods
• Toyota OEM lower ball joints
• Toyota OEM sway bar bushings (front and rear)
• OME 906 rear springs w/ Bilstein 4600 shocks. Btw, my old 906 springs only shrunk 1/2".
• All 4 training arm bushings replaced with Whiteline bushings
• Panhard bushings replaced w/ Whiteline as well

As you can see from the crude hand drawn pic, I've taken down some measurements. Unlike most of you, I measured from the top of the tire to the bottom part of the wheel arch. For those who can't see the pic:

Front drivers = 6.5". Front passenger = 7.0"
Rear drivers = 6.0". Rear passenger = 7.25"

Now of course I realize that the gas tank is on the driver's side and my rear tire is on the passenger side too, which should account for the droop on the rear driver's side. So, the tire + rim is about 75-80lbs. When I removed the tire and remeasured, the gap increased by only a quarter-inch (6.25"). The gas tank as of today probaby has close to 18 gallons, which I filled up 1-2 nights ago. So 18 gal x 6.06 (weight of a gallon of gas) = 109lbs + the weight of the gas tank (not sure of that). So roughly guesstimating, I would think the added weight should cause the rear driver's side to decrease no more than 0.75".

So trying to solve two problems here:

1. What do you guys think is the reason why the front passenger side is 0.50" taller? Or conversely, why is the front driver's side 0.5" lower?
2. Same question for the rear. If my guesstimate is true that the rear driver's side is lower by about 0.75" because of the weight of the gas tank + gas + rear tire, then why is the left rear about 0.5" taller than the passenger side?

I'm thinking it might be wise to half-way loosen the sway bar brackets and end link nuts and drive it around somewhere rough to possibly see if there's any binding. Since the rear end trailing arms are Whiteline, no worries there. As for the UCAs, I undid the nuts under load and then retorqued them again. Perhaps I should try again on the passenger front. Maybe something is binding.

Anyways, thanks for reading this far. Any tips, things to try, etc. would be greatly appreciated.

Bob98SR5

 

[WayneM]

The OME 906 come as left-side and right-side to compensate for the gas tank. Just confirming you installed the correct one on the correct side??

 

[pluton]

Most USA 4Runners you see (and Land Cruisers) are lower on the left than the right. Personally, I'm not convinced the side-specific springs from OME solve this issue.
Your photo shows the truck sitting level; If it is empty of cargo, you need taller rear springs. If it's level when empty, it'll drag it's butt when loaded.

 

[TracyNorton]

to add to what WayneM mentioned...

rather than decide what country I live in and what side is 'passenger or driver'
I put the taller spring on MY driver's side

lol

 

[Zhehan]

Make sure you torqued the rear link bushings on level ground. Also, it will matter how full the gas tank is when you do this. I think it's best to do the work when the gas tank is nearly empty. And the difference between 6.0 and 7.25 is 1.25" That's a LOT lower. Generally it's maybe 0.5" at most. I think you installed the rear springs on the wrong side or set the bushings when the truck wasn't level.

My .02