2006 Landcruiser AHC rear springs on a 98 LX470?

[darkwithn]

I found the part numbers for 2006 AHC springs. I need to find out if it is the same springs used on the 98LX. If so I can order from a local dealer were get a big discount. Thank you.

Part numbers 48231-6A770
48231-6A780

 

[bonze]

The real question is why are you replacing your springs so soon? The AHC systems are known for failed actuators, sensors, or bad fluid in the system not bad springs. I only ask because I was led on a wild goose chase and I ended up spending wasted money on bad or wrong parts. I just dropped my LX off at ACC in ATL to rip out my AHC and replace with Ironman. Best of luck.

 

[darkwithn]

I have high neutral PSI right rear. So I am going to replace both springs. Already replaced all 4 accum and the other 3 corners are in spec. I just need a parts expert to help confirm the Toyota springs were the same for 1998 and 2006. Thanks.

 

[bonze]

Good Luck, maybe contact Cdan the parts guy. I had so many problems with my AHC I had it taken out. ACC here in Atlanta did a great job, "2 ironman lift not nearly as smooth as that AHC system.

 

[uHu]

The real question is why are you replacing your springs so soon? The AHC systems are known for failed actuators, sensors, or bad fluid in the system not bad springs. I only ask because I was led on a wild goose chase and I ended up spending wasted money on bad or wrong parts. I just dropped my LX off at ACC in ATL to rip out my AHC and replace with Ironman. Best of luck.

Shu hada! One of the main reasons for problems with the AHC systems is weak springs. The thin rear coils don't last long - max 5 years, and the TBs need adjustment at least as often.
Those coils should have been changed long time ago. Even the air filter (cyclone) lasts longer than those coils.

 

[sonk76]

Also, I've been very happy with swapping out the AHC specific TB's and rear springs for the "standard, non-AHC TB's and springs" even though I still run AHC. I find that with the extra weight added to the vehicle the stronger non-AHC springs really improved the ride. So if you think you'll be adding weight down the line, and hope to keep the AHC, you might consider looking for the non-AHC parts instead...

 

[uHu]

Also, I've been very happy with swapping out the AHC specific TB's and rear springs for the "standard, non-AHC TB's and springs" even though I still run AHC. I find that with the extra weight added to the vehicle the stronger non-AHC springs really improved the ride. So if you think you'll be adding weight down the line, and hope to keep the AHC, you might consider looking for the non-AHC parts instead...

You would have to add a ton of extra weight before you have enough ahc-pressure for the shock absorber function to work.

 

[sonk76]

You would have to add a ton of extra weight before you have enough ahc-pressure for the shock absorber function to work.

I guess it's the combination of the "lift" + "weight" that makes this combination work for me... It's possible that if my truck wasn't running an AHC lift that the non-AHC TB's and springs would be too much.

I have never measured the actual pressure in the globes, so I have no idea how close/far I am from spec. All I know that this combination feels the best that the truck has felt since it was stock--both extremely compliant and smooth, plus very controlled at highway speeds...

EDIT: Was thinking about this a little more, and I wanted to point out that in my case I'm running USED non-AHC torsion bars and springs. I suspect that they may be a little "tired" compared to brand new ones, which might have helped in making them work...

 

[TeCKis300]

Instead of new springs, a cheaper fix is to use trim packers (10mm) to bring the pre-load back into spec.

 

[sonk76]

Instead of new springs, a cheaper fix is to use trim packers (10mm) to bring the pre-load back into spec.

Good point. I did that too before switching the springs. I used two 10mm spring spacers on on each side in the rear.

 

[Nishiki]

Where can Iget trim packers in the US.

 

[LandCruiserPhil]

Where can Iget trim packers in the US.

Every vendor that caters to Land Cruisers

 

[nahtnoj]

If you Google that p/n there is a lot of conflicting information. Some sources list as 06-07, others 05-07.

I'm sure they are physically the same length, but may be slightly different rate from other years. Can the dealer you are purchasing from confirm?

 

[Nishiki]

Will call after work, trying to see what best option will be.

From what I have gathered:

Trim packer option - every 5mm lowers .2 -.3 mpa, however the compression curve would yield higher drops in mpa as we move along the coil rate curve. I believe that I could get near stock with 30mm packers.

Lc100 non-ahc spring - firmer than packers and much firmer than ahc stock. But, would, at worst bring me to around 5mpa and I can add more weight or raise further.

Best option - "tired" LC non-ahc springs should bring me to a near perfect spec.

I want to move fast on this so trim packers may be the way to go for the the time being.

 

[Nishiki]

Sorry, wrong post. I just trying to correct pressures after ahc lift. The aforementioned are what I am deciding between.

 

[PADDO]

Will call after work, trying to see what best option will be.

From what I have gathered:

Trim packer option - every 5mm lowers .2 -.3 mpa, however the compression curve would yield higher drops in mpa as we move along the coil rate curve. I believe that I could get near stock with 30mm packers.

Lc100 non-ahc spring - firmer than packers and much firmer than ahc stock. But, would, at worst bring me to around 5mpa and I can add more weight or raise further.

Best option - "tired" LC non-ahc springs should bring me to a near perfect spec.

I want to move fast on this so trim packers may be the way to go for the the time being.

My experience is you will see about half that pressure drop, I got between .2 and .3MPa with 10mm packers on 2 different vehicles.

 

[nahtnoj]

Oh I get it now. These are LC part numbers, and the LC was only available with AHC in 06 and 07. I'd bet the same part for an LX would show fitment from 98-07.