Advise me: rear springs, no/min lift, less sag when loaded

Kamil

New member
Help, my butt is sagging!

Background: 2010 SR5 with 3rd row, 57,000 miles. Front Bilstein 5100s at .80", rest of the suspension is factory stock. KO2s 265s on Trail wheels, spacers. Other relevant modifications: Slee rock-sliders, installed more as a step-up for the kids and side impact protection (tested twice!) than actually sliding on rocks.

I got the 5100s for the purposes of leveling and getting rid of the body dive under braking.

My "off-roading" is limited to Boston's crappy roads, dirt roads in the White Mountains that can be conquered in any minivan, and un-plowed snow-covered roads - those I do all the time as my job requires me to be available during snow emergencies, I even have a state ID that allows me to drive during snow emergencies. :hat:

Here's the thing. With the front 5100s at 0.80" and some added weight, my 4Runner looks like it's slanted towards to the back, also known as reverse rake. When loaded with stuff, which happens often, the butt really sags.

I understand that my shocks are due for replacement. My plan is to get the Bilstein 6112 (front spring/shock combo) and rear 5160 shocks (TRD Pro-like set-up), or something equivalent. But all the kits I see exclude the rear springs.

My questions are:
- Will new 5160s prevent or reduce the butt drop?
- Should I consider new/different rear springs, and if so, what kind? (I don't want much of a lift)
- Should I leave my stock springs in and add spacer with the 5160s?
- I thought of AirLift helper springs but I'm not sold on the idea for various reasons.

I don't really want a lift a kit but I'm fine with a little lift, 1-1.5". I often park in city garages with low clearances. I don't "off-road" like some hard core people here do. When I do off-road, the stock 4Runner's abilities are fine. (I've taken off-road driving classes and spent a month in Africa in a D110).
 

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Help, my butt is sagging!

Background: 2010 SR5 with 3rd row, 57,000 miles. Front Bilstein 5100s at .80", rest of the suspension is factory stock. KO2s 265s on Trail wheels, spacers. Other relevant modifications: Slee rock-sliders, installed more as a step-up for the kids and side impact protection (tested twice!) than actually sliding on rocks.

I got the 5100s for the purposes of leveling and getting rid of the body dive under braking.

My "off-roading" is limited to Boston's crappy roads, dirt roads in the White Mountains that can be conquered in any minivan, and un-plowed snow-covered roads - those I do all the time as my job requires me to be available during snow emergencies, I even have a state ID that allows me to drive during snow emergencies. :hat:

Here's the thing. With the front 5100s at 0.80" and some added weight, my 4Runner looks like it's slanted towards to the back, also known as reverse rake. When loaded with stuff, which happens often, the butt really sags.

I understand that my shocks are due for replacement. My plan is to get the Bilstein 6112 (front spring/shock combo) and rear 5160 shocks (TRD Pro-like set-up), or something equivalent. But all the kits I see exclude the rear springs.

My questions are:
- Will new 5160s prevent or reduce the butt drop?
- Should I consider new/different rear springs, and if so, what kind? (I don't want much of a lift)
- Should I leave my stock springs in and add spacer with the 5160s?
- I thought of AirRide helper springs but I'm not sold on the idea for various reasons.

I don't really want a lift a kit but I'm fine with a little lift, 1-1.5". I often park in city garages with low clearances. I don't "off-road" like some hard core people here do. When I do off-road, the stock 4Runner's abilities are fine. (I've taken off-road driving classes and spent a month in Africa in a D110).

I don't think you need shocks, but you may need to find springs that work. Or airbags?
 
If you want a nice 1 inch lift that rides better than stock but doesn't feel rough like an offroad lift, I would consider the rear Eibach Pro lift 1 inch spring. I enjoy mine and it'll match well for what you are trying to achieve in the front.
 
I found that TRD Pro rear springs are taller than early 5th gen limted springs, they’ll give some lift and be a good match for 5160’s should you go to bilstein for shocks then find some stock TRD Pro front springs to have minimal lift over your current setup. I went with eibach 14” 600lb springs up front and tr pro rear springs but with the front shocks set at the bottom perch the rack is reversed a little so I plan to add ome trim packers to level it atleast till the front springs wear in a little
 

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I don't think you can level it for normal driving and then NOT have it sag when loaded in the rear.

AFAIK, you have two options, set up the suspension with a slight rake like they do from the factory so that once loaded in the rear it will be level.

or


Install airbag helper springs and pump em up a bit when you are going to carry a load.
 

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