**Rear Coil Spring Discussion - The Perfect 3rd Gen Rear Spring**

[rickashay]

890s are not meant for extra load, and they will sag in time. Ask me how I know.

There are a ton of springs (and shock combos) out there so rather than just look at one spring, consider the type of driving you mostly do and what weight you carry, average and max, and choose the best balance.

891s may be stiff when the truck is unloaded. Air bags might be a good compromise in addition to rear springs for those extreme situations.

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This is good advice.

. I’ll bet there was 300 lbs, maybe more in the back plus a full at set of 3 4XI belly armor plates, lotus lower arm mount protectors, a lil skips tank skid,and 5 people. I’m sure once I get the 4XI sliders on it won’t help the situation either.

5 people!? Unless you are talking children, I’m wondering how you get 300lbs of weight for all those people and your mods. Lol

In all seriousness, like mentioned above, tons of good spring/shock options depending on how you want to set your truck up for the type of driving you do most often. Decide on your use case, choose a tire size, and spec accordingly.

 

[Romeo1]

This is good advice.



5 people!? Unless you are talking children, I’m wondering how you get 300lbs of weight for all those people and your mods. Lol

In all seriousness, like mentioned above, tons of good spring/shock options depending on how you want to set your truck up for the type of driving you do most often. Decide on your use case, choose a tire size, and spec accordingly.

Well, 2 adults up front and 3 kiddos in the rear. Probably 600 lbs in people. Plus 4XI plates nose to the gas tank and a lil skips skid on the tank.

The 300 lb number was my gear estimate. It’s probably between 200-300 actual. I should just go weigh it at the farm and see what’s really in it for weight.

I have 6112 Bilsteins up front and 5160 reservoir shocks in the rear. The shocks are awesome. I just need a little more spring in the rear when crawling over rocks and obstacles it feels like. Far as how I use it, I use it like a side by side with AC that I don’t have to trailer.

The 2906s were perfect until I added the steel t case and gas tank plates.

 

[octanejunkie]

Here's a decent overview of the OME options

Recap of Old Man Emu spring research - YotaTech Forums

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[fourfive]

Well, I finally hit the point that the 2906 rear springs aren’t cutting it anymore. Last week in Moab loaded up with recovery gear, a lifetime cooler, snacks, clothes, an air compressor and some tools it felt lacking on the trails.

I’ll bet there was 300 lbs, maybe more in the back plus a full at set of 3 4XI belly armor plates, lotus lower arm mount protectors, a lil skips tank skid,and 5 people. I’m sure once I get the 4XI sliders on it won’t help the situation either.

Should I go 2890’s or just go straight to the 2891’s? I plan on keeping the cone and the Duro bumps.

891s may be stiff when the truck is unloaded. Air bags might be a good compromise in addition to rear springs for those extreme situations.

I've often read that 891 were stiff unloaded but based on cruiser outfitters spec sheet, 891 has a lower spring rate 210# compared to 906 which has a spring rate of 220#. The bar diameter of 891 is also thinner at .630" compared to 906 which is .669". On paper, I would think that 891 would be slightly softer than 906.

If you're going to frequently carry +200lbs, I don't think 890 would be a good option.

 

[TW44LR]

Well, 2 adults up front and 3 kiddos in the rear. Probably 600 lbs in people. Plus 4XI plates nose to the gas tank and a lil skips skid on the tank.

The 300 lb number was my gear estimate. It’s probably between 200-300 actual. I should just go weigh it at the farm and see what’s really in it for weight.

I have 6112 Bilsteins up front and 5160 reservoir shocks in the rear. The shocks are awesome. I just need a little more spring in the rear when crawling over rocks and obstacles it feels like. Far as how I use it, I use it like a side by side with AC that I don’t have to trailer.

The 2906s were perfect until I added the steel t case and gas tank plates.

You could try dobinsons c59-137v rear coils, a couple of members run them and are happy with them, they’re variable rate so should ride better with change of weight and should be around the same height as the 2906’s. I’m not sure how they hold up with weight though


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[D1n13L]

I did get the 210v's installed, and I've have had them on my truck since 2020. I still really like the dual spring rate and the ability to carry a heavy load.

With that said, I would NEVER recommend these for a truck running stock weights. You'll end up pushing 5in of lift, which i've found to have a very pronounced effect on the handling dynamics of the truck. Right now I have ~3in of lift on the front, and I still have a solid rake to the truck. With a 4xinnovations plate bumper, full swingout (i.e. cook tray, dual 5gal jerry cans, hi-lift, and 33in mud tire), 10in sub, amp, recovery gear, 5 gallons of water, camping gear for four people, 55qt pelican cooler, I'm still .5-1in higher in the rear.

Now if you are running this heavy I highly recommend the 210v's, even over the OME 861s. The 210v's are progressive so you do end up getting a little better ride out of them when it is 'unloaded' (still with the plate bumper, spare, and sub). In the rocks they flex out well, zero complaints about that. If you're looking to get the most out of a permanently heavy setup I strongly recommend ditching the Bilstein 5100s and going with the Tokico Land Cruiser shocks. They have enough dampening for a 6000lb+ Land Cruiser so the won't struggle with a heavy 4runner. Not only that, they have about .5in shorter compressed length, and .5in longer extended length...also cheaper, I think I paid $43 per shock.

Just so you have all the information, my setup is: 210v's, Tokico LC shocks, Durobumps 5.25in bump stops (awesome upgrade), Eimkeith PCK, extended brake lines, relocated sway bar, poly upper control arm bushings, and new 98'+ OEM lower control arm bushings with Toytec skids. Overall, the rear of my truck is fairly dialed and works great without creaking, binding, or complaining. I've had a chance to demo 2.5in shocks for the rear, and while they are 'better', they don't add enough control to justify the price, the Tokico are good enough for 99% of what I do. Now the front is another story...after my re-gear and front locker install later this year I will be going to Radflo 2.5in coilovers. The 2.5in coilovers are a dramatic improvement over bilstein 5100s or Dobinson twin-tubes.

My rig is currently on jacks waiting for a 4.5 long travel kit. Im going with slightly heavier style 130lb rear bumper because it retains a tow hitch ( need it for bringing my dirtbike), and im looking for a rear coil thatd sit well with that bumper, and a spare to have a little fun in the desert. so roughly fully loaded at 220-250 at the absolute most. Would you reccomend these coils?

 

[blairracd]

For those who’ve gone with the 210s, how many of you have added things like the adjustable panhard bar, extended brake lines, etc?

 

[vegastoy]

Anyone interested in swapping my drivers side 210v for your passenger side? I have a fridge and fridge slide on the passenger side that mostly offsets the weight of the gas tank. Drivers side is sitting about 1/2”-3/4” higher and I’m looking to lower the drivers side a little bit.

 

[AdrianBrewster]

Sorry if this has been discussed already and I missed it. What are the differences between the dobinsons 210v and 137v? On dobinson direct I see the 137v is a selectable option for the 3rd gen where the 210s are not.

 

[Devbot]

Sorry if this has been discussed already and I missed it. What are the differences between the dobinsons 210v and 137v? On dobinson direct I see the 137v is a selectable option for the 3rd gen where the 210s are not.

210V are meant for Land Cruisers is why, they fit but they're not intended for our vehicles. They're much taller progressive rate coils that give you upwards of 4in of lift.

 

[AdrianBrewster]

210V are meant for Land Cruisers is why, they fit but they're not intended for our vehicles. They're much taller progressive rate coils that give you upwards of 4in of lift.

Ah, makes sense. I just installed the 137v on the rear last week. I am expecting them to settle a bit and I do have my 4x bumper coming in the next couple of weeks, but I netted 3"s on my 99. Sitting at 24 inches hub to fender all around (except on the driver front, thats at 23.5. no trim packer)

 

[Yotaqueen]

I'm looking for extra weight carrying capacity for my 99 with a full bumper/tire carrier, fully loaded about 275lbs of weight in bumper + occasional 130lbs of 2 bikes + rack + gear.

I dont want any lift, 1-2 in max. I know 99' is 1" higher and i like the height so a 2" lift should be 1" on top of what I have, correct?

Back is sagging a bit with the bumper + extra. Just want to bring it back up and be able to handle the bike racks. Not sure what shocks either.

I will get to front but it's fine for now, eventually same thing, minor lift. mostly oem.

 

[Jaysen4runner]

210v sag. Unable to hold weight probably switching over to ome 861 soon

 

[Devbot]

What are you 210V folks doing for coil isolators - did you keep the OEM cones, scrap em, or what?
I took mine out because I hate how they look and wanted to drop my rear down slightly but without them the coils buzzed nonstop over the smallest bumps in the road. I put them back in so it wouldn't be so embarrassing driving around but that extra height drives me nuts; I can almost swear they add upwards of 1/2 inch instead of 1/4 inch even though i know better (stupidly didn't think of taking before/after measurements to confirm this afternoon)
I would love to even out my rake even just slightly but I really don't want to carry around a bag of sand or gravel - been there-done that, a year later I'm STILL vacuuming up sand and pebbles. Anyone got a trick up their sleeve? I'm assuming not since solid axles are dead simple and there's not really much to hide but I thought it would be worth asking regardless. I heard one user tried to slip a piece of tubing over the top of the coils which sounded like a smart idea, but apparently it fell out pretty quickly (and I imagine zip ties wouldn't last long with constantly rubbing against the body)
What I wouldn't give for these coils to be a hair shorter.... If they were wrapped a little differently I probably would've taken a sawzall to them by now honestly. Hell I'm still considering it a little bit, but I'm not that cheap and will probably get some new front coils if I can't think of anything

 

[jrm]

Does anyoneknow the difference between the 906 and the 901? Also what is "free weight" and why is it measured in inches? Is it uninstalled length of coil?

 

[Bad Luck]

Free height is the unloaded (free from weight) height. It’s the longest the coil will ever be which can determine if your coil is going to fall out of place while flexing.

901 coils are for the rear of 2nd gens. 906 coils are for the rear of 3rd gens

 

[HiluxSurf SSR-G]

is the front conical coil isolator of the LC80 similarly sized to that of the VZN185L 4Runner?

What are you 210V folks doing for coil isolators - did you keep the OEM cones, scrap em, or what?
I took mine out because I hate how they look and wanted to drop my rear down slightly but without them the coils buzzed nonstop over the smallest bumps in the road. I put them back in so it wouldn't be so embarrassing driving around but that extra height drives me nuts; I can almost swear they add upwards of 1/2 inch instead of 1/4 inch even though i know better (stupidly didn't think of taking before/after measurements to confirm this afternoon)
I would love to even out my rake even just slightly but I really don't want to carry around a bag of sand or gravel - been there-done that, a year later I'm STILL vacuuming up sand and pebbles. Anyone got a trick up their sleeve? I'm assuming not since solid axles are dead simple and there's not really much to hide but I thought it would be worth asking regardless. I heard one user tried to slip a piece of tubing over the top of the coils which sounded like a smart idea, but apparently it fell out pretty quickly (and I imagine zip ties wouldn't last long with constantly rubbing against the body)
What I wouldn't give for these coils to be a hair shorter.... If they were wrapped a little differently I probably would've taken a sawzall to them by now honestly. Hell I'm still considering it a little bit, but I'm not that cheap and will probably get some new front coils if I can't think of anything

 

[HiluxSurf SSR-G]

does the 901 have the same OD as that of the 906? That could be a potential alternative, longer coil with the same spring rate

Free height is the unloaded (free from weight) height. It’s the longest the coil will ever be which can determine if your coil is going to fall out of place while flexing.

901 coils are for the rear of 2nd gens. 906 coils are for the rear of 3rd gens

 

[Bad Luck]

does the 901 have the same OD as that of the 906? That could be a potential alternative, longer coil with the same spring rate

I have no idea if they will interchange, but 901 springs are only 5mm longer free height than 906 springs. You’d get more height by adding trim packers to 906 springs.

 

[Devbot]

is the front conical coil isolator of the LC80 similarly sized to that of the VZN185L 4Runner?

I had that idea but I couldn't find any that weren't just as thick if not more. But I also didn't look very hard so maybe I'll give it a whirl, if anything they'd give a way cleaner look