I like the way you’re thinking. I could purchase another OEM passenger coil and have both of the long coils with the spacer on top of them
or get busy on my rear bumper 
LX 570 Custom Springs? (1 Viewer)
- Thread starter OregonLC
- Start date
This site may earn a commission from merchant affiliate
links, including eBay, Amazon, Skimlinks, and others.
or get busy on my rear bumper 
I was looking for an easy, reversible way to increase spring constant and ran across spring rubbers.
After measuring four corners (B,B front, B+,B back) spring gaps, I got a set of B in the 2nd hardness (blue), as that was my guesstimate of what the stock springs actually carry (3k lb).
I decided to put on the front, as my recently installed bumper/winch was on the front, and that was when the ride got unacceptably soft and see saw in soft mode.
Cut to length (hacksaw easier than shears) of 16 1/2”. Used Oatey Silicone grease to install instead of wd40 on instructions. Install about 45 min then 15 min. Not very hard to get the spring rubber in between the coil. Mostly hand pressure, a small amount of screwdriver prying.
I did a quick 15 min tour around my neighborhood and the ride is much much improved. No more front to back see saw on bumps, holes, or braking. Soft mode back on the menu. Firm feels like it should.
I think I may reach out to company and see if they’ll make me a kit with B and B+ size for rear in the softer red model.
I also got about 1/2” of front end ‘lift’ from the stiffer effective spring constant.
No issues accessing low mode.
Last pic is with tire on and Guzzler on ground.
After measuring four corners (B,B front, B+,B back) spring gaps, I got a set of B in the 2nd hardness (blue), as that was my guesstimate of what the stock springs actually carry (3k lb).
I decided to put on the front, as my recently installed bumper/winch was on the front, and that was when the ride got unacceptably soft and see saw in soft mode.
Cut to length (hacksaw easier than shears) of 16 1/2”. Used Oatey Silicone grease to install instead of wd40 on instructions. Install about 45 min then 15 min. Not very hard to get the spring rubber in between the coil. Mostly hand pressure, a small amount of screwdriver prying.
I did a quick 15 min tour around my neighborhood and the ride is much much improved. No more front to back see saw on bumps, holes, or braking. Soft mode back on the menu. Firm feels like it should.
I think I may reach out to company and see if they’ll make me a kit with B and B+ size for rear in the softer red model.
I also got about 1/2” of front end ‘lift’ from the stiffer effective spring constant.
No issues accessing low mode.
Last pic is with tire on and Guzzler on ground.
Interes
Interesting approach and certainly easy enough and reversible. If it gives you what you're looking for, that's all that matters.
I'm interested in how this would compare to using the westcott preload kit (if it even works on the LX)? Though that is more complex to install requiring removal and tear down of the coilover, and depressurizing AHC.
For the rear, I'd highly recommend airbags. They've been working incredibly well to get adjustable spring rate. Obviously the AHC system can already compensate to a degree, but using airbags to further expand the payload or variable payload capacity has been awesome. It's great for car camping too in that it allows manual leveling of the rig side to side and front to back. Too many pros in my mind and it's pretty cheap to do. In my setup with extended rear shocks, it further works as a more aggressive jounce stop.
Interesting approach and certainly easy enough and reversible. If it gives you what you're looking for, that's all that matters.
I'm interested in how this would compare to using the westcott preload kit (if it even works on the LX)? Though that is more complex to install requiring removal and tear down of the coilover, and depressurizing AHC.
For the rear, I'd highly recommend airbags. They've been working incredibly well to get adjustable spring rate. Obviously the AHC system can already compensate to a degree, but using airbags to further expand the payload or variable payload capacity has been awesome. It's great for car camping too in that it allows manual leveling of the rig side to side and front to back. Too many pros in my mind and it's pretty cheap to do. In my setup with extended rear shocks, it further works as a more aggressive jounce stop.
I’m not a suspension expert, just ran the spring equation with a coil/turn less than stock and figured that would be an ok number to be at on the limit. The spring rubbers take out a portion of one coil, the harder the rubber the more portion of one coil is removed. I am guessing this blue one is equivalent to 1/2 a coil.
I’ll look at airbags if I decide I need more support in the rear. I like the idea of multi use and adjustable.
<edit - not having to depressurize the front shocks was a big bonus >
Casually shopping airbags and saw the firestone 4135 on the Amazon warehouse for $70. Stuck it in the cart and hit buy 
Don’t even think I need them . . .
Firestone site shows compatible with Lx570 . . . 2013 thru 2021
4164 is lx570 2008 - 2011.
I have a gen 1 LX, but it it the same rear end as the gen 2 and 3.
Most use the 4164 which also shows compatible with TLC all years and LX gen 1.
Here’s to hoping Firestone didn’t confuse the LX with the GX.
Don’t even think I need them . . .
Firestone site shows compatible with Lx570 . . . 2013 thru 2021
4164 is lx570 2008 - 2011.
I have a gen 1 LX, but it it the same rear end as the gen 2 and 3.
Most use the 4164 which also shows compatible with TLC all years and LX gen 1.
Here’s to hoping Firestone didn’t confuse the LX with the GX.
Last edited:
Casually shopping airbags and saw the firestone 4135 on the Amazon warehouse for $70. Stuck it in the cart and hit buy
Don’t even think I need them . . .
Firestone site shows compatible with Lx570 . . . 2013 thru 2021
4164 is lx570 2008 - 2011.
I have a gen 1 LX, but it it the same rear end as the gen 2 and 3.
Most use the 4164 which also shows compatible with TLC all years and LX gen 1.
Here’s to hoping Firestone didn’t confuse the LX with the GX.
View attachment 3104589
I have the 4164s and they fit well for my extended shock setup that also has 30mm coil spacers. I cut off 2 sections of the jounce stop IIRC.
I’m going to let it ship and see if it looks like it’ll fit when it gets in. From the pics the only diff is the spacer rubber and the the valve onto the airbag.
I don't have the exact model, but ~1992 diesel 80 series.
How much variation was there?
Springs set the natural frequency of the vehicles motion. Too soft and they wallow. Too hard and they jiggle.
thanks for following back with the year and that it was diesel.
I’m about to order the TT2168 just would like those who have done the same to confirm - will I likely need spacers too if I have a sensor lift and looking to tow a 600-700lbs tongue weight trailer ?
I was originally looking to install 40mm spacers to the OEM springs but now looking to replace the coils with the TT.
I was originally looking to install 40mm spacers to the OEM springs but now looking to replace the coils with the TT.
1world1love
SILVER Star
Yeah, I don’t think I’d install spacers with these springs. If the additional weight is just the trailer then you might actually consider spacers and airbags rather than springs.
As I have a sensor lift I’m looking at 40-50mm spacers but I’ve only been able to find some from Ukraine but will still need trimming of the bump stop.
Has anyone had success with other 40-50mm spacers locally?
How much rear sensor lift do you have? A 30mm spacer should generally accomodate most sensor lifts.
If you can't find what you need, might be able to stack spacers. Meaning maybe a 20mm spacer between the body and jounce stop. And another 20mm spacer between the jounce stop and spring.
Or 20mm worth of spacer and make-up the rest with airbags.
So all this long travel success has me thinking about Longer, custom springs.
Rear
We now know the spring constant for the rear two (105, 76). Is a good target 90? And they just need to be 2” longer than the long side (right, us passenger?) (30 to 50mm spacers are being used today)
Front
What would front customs need to do? Longer and stiffer by how much? Between the top hat spacers and prelod collar I’m not sure which actual spring changes could obsolete.
Rear
We now know the spring constant for the rear two (105, 76). Is a good target 90? And they just need to be 2” longer than the long side (right, us passenger?) (30 to 50mm spacers are being used today)
Front
What would front customs need to do? Longer and stiffer by how much? Between the top hat spacers and prelod collar I’m not sure which actual spring changes could obsolete.
Last edited:
I’d definitely be in for the rears
Did you perchance measure the fronts when you had them off? For length, width, metal thickness? I’d love to calculate the front spring constant for the LX.I’d definitely be in for the rears
Front springs - 8 turns. Assume same gauge as larger rear coil (.5 in), assume 5” width. 154 lb/in (this is provisional)
New estimate - 15mm thick, 99mm Inner diameter-> 299 at 7.5 turn, 325 at 8 turn.
I assume when I get home I can measure the wire, and hopefully the width too, and refine these assumptions.
(Edit fix assumption on width from 4” to 5”.
New estimate - 15mm thick, 99mm Inner diameter-> 299 at 7.5 turn, 325 at 8 turn.
I assume when I get home I can measure the wire, and hopefully the width too, and refine these assumptions.
(Edit fix assumption on width from 4” to 5”.
Last edited:
Grinchmeister, if you recall i also did double tall oem in the back to equalize the system at the rear axle and lean corrected. One of the first mods i did.
So you maybe might think of buying both f/r sets of coils off whatever sku model you go to.
So you maybe might think of buying both f/r sets of coils off whatever sku model you go to.
Are the front springs the same measurements as tlc? As far as length and width? Probably right?
Tlc on ironman page shows 425/415mm length (17in), and 127mm wide (5 in).
<fix maths error >
The 1” lift coils are 450mm, so I need 18” replacements.
Tlc on ironman page shows 425/415mm length (17in), and 127mm wide (5 in).
<fix maths error >
The 1” lift coils are 450mm, so I need 18” replacements.
Last edited:
I think so, i dont see where there is any more room for coil width or length from my multiple dissasemblies.
Its just coil thickness and wraps that differ. Otherwise my preload would not have seated correctly.
Purple??? Would go well with this for heavier than stock front ends.
Dont catch my uniformity stickler disease though if you can avoid that.
