LX470 NonAHC Rear Coil?

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Nishiki

Nishiki

10 Year
Joined
Dec 1, 2014
Threads
3
Messages
36
Can anyone tell me what coil I can use on my rear (LX470 2004) to help decrease my pressure?

I have a reading of 8.4mpa and need to get back into factory spec.


I am looking for a non-ahc to get as close back into spec as possible.

Thanks in advance!

PS: I searched and didn't feel like reading anymore without getting certain answers.
 
8.4MPa at what height? Tired coils and/or height in excess of spec will give you high pressure readings. Neutral pressures are valid at neutral height. Unless you've added additional weight permanently you should stay with coils designed for your system.
 
If you are planning on using the vehicle in stock form and not adding permenant weight to the vehicle, I'd stick with the OEM coils. They wear out and compress over time putting more load on the AHC system. If new OEM coils and a TOrsion bar adjustment don't get close to spec measurements, you could try a trim packers on top of the coils.
 
Yea, new AHC coils and crank front Tbars. Using non-AHC coils with the AHC system still in place will cause an excessively bouncy ride, unless you plan on having it loaded down with quite a bit of gear and armor.
 
I have non-AHC from a LC100 sitting in my garage to gi under (still, shame on me).
There are many owners who have swapped them with good results.
We are using the LX for camping towing the Kimberley Kamper which causes the system to go to Low.
 
Have you looked into converting the system over to standard coils and shocks? Just a thought. It's a relatively cheap conversion compared to having to repair a failing AHC system. My LX470 has been converted and rides/sits very nice. It's a matter of figuring out what ride style you like best and then purchasing the appropriate suspension. OME has some great options.

AHC is a great concept and I've heard of many LX owners having positive experience/longevity with it. I guess in the end it's all a matter of proper maintenance within each individual system. Good Luck!
 
You've received some good advice here. Figure out which system is the one that fits your preference, needs or use and go with that system.

If it is AHC, get all the components working to spec. That means new rear coils, as yours are tired, and adjusting the torsion bars, for the same reason. The best way to do this is have the TechStream software to make sure it is all adjusted correctly. I've already done this on my AHC truck.

If you are best served by a conventional system, then swap to those coils, t-bars and shocks. As stated, OME is one good option. I happen to have that on my other truck.

In my humble opinion, this idea of mixing components from non-AHC into an AHC truck is flawed logic. Either AHC works for your application and it should be maintained as Toyota/Lexus designed, and all components should be operating as intended....or it isn't up to your usage requirements (ie. it is overloaded and dropping into the low, limp home mode) and you need to remove it and install a conventional system that is up to those demands.
 
TLX100, I plan on using some trim packers if I can't get back into spec with the non-ahc coils. Thx for reaffirmation.

Wilsil, Coils for sale?

Joel and Super90, I understand that most people go with OME, this is not a smart thing to do IMO. I think that losing the AHC for someone who does not primarily off road is a bad thing. I have 160k on the lx and have not had any issue with it. Change suspension fluid frequently never had any serious issues with any system in the car, and have used a techstream to repair anything myself for very very cheap. Aside from the actual compressor for the AHC going out, the system itself can be repaired three times over before an OME system would breakeven.. and even then I would lose my control over load cap and ride.

Super90, I have a minivci and a techstream, hence the reading. Also, my vehicle has never dropped into low. I have loaded over 700lbs into the the vehicle, including 2 big men, and a ton of boarding gear, since the changes(before my techstream reading) and the vehicle maintained proper height throughout. IMHO it is flawed logic to assume that a vehicle cannot be maintained with mixed components, as there are several instances where mixing components leads to a far superior ride.

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Was a simple question. All I want to know is what non-ahc coils I can use?

I recently added larger tires to the lx and had to AHC raise them to get the tires to fit and look proper on the vehicle, this coupled with my last techstream check being almost 8 months ago, has probably lead to me being so far out of spec. In fact, I just checked again today and it seems that when I go from L to N on the vehicle the pressure in the rear reads 7.7, not too far off from spec. I have not been driving the lx because of this, and am hoping to get back to spec before I do any more traveling. The NONAHC Coils will work better since I have performed the ahc lift. Else, I can get the ahc OEM coils and add a 20-30mm spacer, however the fewer the pieces I have to use to compensate the fewer points of failure I can have.

There is a lot of opinion and speculation above. I simply wanted to know what coil to use. I am guessing I can just get a lc100 coil from a similar year as my lx and it will be fine?

Are the lc rear coils much cheaper? I will have a look myself in a sec.

Thanks in advance guys. Sorry that I didn't post more information in my original post.
 
Well, it sounds like you're going to try to do this! I've had very good luck with OME suspension. They also sell all their suspension components a la carte. I believe you can get rear coils for you LX for a couple/few hundred bucks on Slee Off-road.

I'm curious, what size lift did you install in your LX? Or did I misunderstand your statement about performing an AHC lift?

30mm is a little over an inch and I think the minimum coils available (above stock height) is 1.5"

I'm not sure how that extra half an inch or so would effect the AHC from operating correctly. You may have to go with the spacers and use a stock height coil from OME or find some Stock LC coils.

Hopefully I'm not completely misunderstanding your question above. Just an FYI, expect both speculation and opinions; those are two elements found in every forum! If you want a "professional" opinion, go to your Local Lexus dealer and ask them what you should do. Guarantee they'll tell you not to attempt what you're trying to do, which is why, and I'm assuming this, you posted this question on here in the first place.

You now have my attention on this matter. I'm interested to see how this all turns out. Being a LX owner myself and "falling victim" to a removed AHC system in effort to save myself from a potentially costly repair, I'd like to see if this option works well for you.

Keep us posted!
 
Some worn non-AHC coils from a 100 might be worth a shot. You could probably get someone on here to give them to you if you will pay for shipping. I'm not personally aware of an aftermarket coil that would be in between an AHC and non-AHC coil.

The only risk to that is that the tension of the non-AHC coils exceeds the tension of the rear AHC, and the ride quality might not be correct. It might already be a bit stiff if you are using an AHC lift.

I think your pressure numbers are about the same as mine, and I have new AHC coils, whatever that is worth.
 
Thanks for great replies this time. I believe I am going to get a set of 20mm and 30mm packers on oem.

Joel, I definitely will report back with pictures etc.

TLX, excellent point.

Anyone have any worn LC100 shocks they can send out??? I will pay shipping and get some extra $$$ for the help.
 
Joel, forgot to add. I maxed out AHC, slid to max height and shortened. About a 3" lift overall. Everything still works fine and is very close to being in spec.
 
Nishiki said:
Anyone have any worn LC100 shocks they can send out??? I will pay shipping and get some extra $$$ for the help.
Click to expand...

I'm assuming you mean LC springs? Following this thread to see how it works out. From time to time I've thought about switching over to our 04 LX and wheeling with AHC. My plan would be to use LC coils, hoping they would be of proper intermediate spring rate for a loaded/modded 100, stiffer than LX but not as stiff as OME and therefore enabling the AHC to function somewhat withing spec. What's the weight of your vehicle? I'm at about 7k.

Subscribed.
 
OregonLC said:
I'm assuming you mean LC springs? Following this thread to see how it works out. From time to time I've thought about switching over to our 04 LX and wheeling with AHC. My plan would be to use LC coils, hoping they would be of proper intermediate spring rate for a loaded/modded 100, stiffer than LX but not as stiff as OME and therefore enabling the AHC to function somewhat withing spec. What's the weight of your vehicle? I'm at about 7k.

Subscribed.
Click to expand...

Check out @sonk76 's build thread. I believe he did this.
 
@OregonLC and @TXLX100, this is exactly the direction I initially wanted to go. Trim packers on my current or new oem ahc might get me into an intermediary spring rate between ahc and non, however I dont like more points of failure.

@OregonLC, my weight is at 6300 w/spare. But added stress on my ahc from the raise would indicate I need non-ahc spring.

If anyone has used lc100 nonAHC coils let me know, I would prefer used. If I dont get a response on this, I might go scoop some up after work today or tomorrow from the toyo dealer.
 
Wishing I would have saved mine! Got into dumpster mode when I moved a few years back...
 
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