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  1. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Do your wheels and tires, then get the alignment. Alignment best done after any changes to suspension, wheel/tire, or steering rack rather than before.
  2. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Thought I’d post a personal experience update. Installed a set of King KTRS-79 springs on my truck today. I’ve slowly been loading up the LX with drawers, roof gear, armor, and knew I needed some more support from the springs to help the longevity of the AHC. Here are my results loaded with a...
  3. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Hey Todd, welcome to the club. I'm not too far north in Cincinnati. Re AHC, you won't be able to do a graduation test until you can go into L, N, and H. You can add OEM AHC fluid to your reservoir now, but that likely won't fix the problem. The pump doesn't care if the reservoir is low and will...
  4. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Highly recommend the King springs for anyone on the fence about new OEM springs. They’re not much more money, just have to go get them on eBay or another place that will have Aussie vendors. They seem to ride fine even on an unloaded truck and basically future-proof the AHC for any weight additions.
  5. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Agree with Indro overall. Most of the front or rear bleeding comes from the first globe you do. Hence only getting small amounts of fluid out when you switch sides according to the bleeding procedure that's been posted here. Obviously, bleeding all 4 corners is better than 3, which is better...
  6. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Update: added @suprarx7nut's excellent video and cheat sheet to the early posts in this thread as well as some basic research I've done about different AHC mods.
  7. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    if they line up with the metal wheel well lip then no difference. If they’re higher than you’ll need to add the difference into your measurements.
  8. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Some find adjusting the front affects the rear very little. It can occasionally increase/decrease pressures depending on how significant a change you have to make. I'd guess yours won't change too much after adjustment. Take two or three readings each with temp sensor connected and...
  9. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Most here seem to feel pressures near the lower-middle of the range are best for ride, longevity, and give you wiggle room to load the vehicle up a bit and stay within spec. Yours are pretty good but if it's not too hard for you to make some adjustments, you can probably get them even better...
  10. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Good question. The opposite side can be done running or after restarting, setting to N, and then shutting back off. Probably best to turn it back off. You are bleeding a very tiny bit of fluid out, so the vehicle height drops minimally if at all. The point of restarting is to get all your new...
  11. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    You've got it dialed in! Nice work. AHC is still one of my favorite parts of the truck too, it's one of those things that makes the LC/LX truly unique. Even the Land Rover air suspensions that they've been refining for multiple decades doesn't compare. And this community helps keep those AHCs...
  12. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    I'm up to 194k on the original AHC "shocks" and globes. No leaks or weeping, still have 8 graduations from L to H. Will need globes at some point, but don't see any limit to the lifespan of the "shocks." Do the maintenance, keep pressures in spec, and the system will treat you well.
  13. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    It’s definitely not a 1:1 ratio. Some on here have suggested a 2:1 ratio (½” sensor movement changes suspension height 1”), but even that’s probably an oversimplification. You’ll have to try some small movements and see what you get. Even better, adjust the heim joint part of the sensor bolt and...
  14. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    The car should be on a relatively level surface, doesn't have to be perfect perfect. Significant tilts/inclines will mess with things. See my response to your PM for some other details you asked about.
  15. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Any luck with a leak source or otherwise?
  16. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Sagging overnight would be more concerning for a leak somewhere in the system. That can happen from excess pressure causing the shocks to leak, so see if reducing pressure helps. But your pressures aren’t so high that I would think that to be the case. Do you have signs of significant seepage at...
  17. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Yup, assuming no error codes and those are your heights at the N setting, the FR and FL sensor are probably reading 1-2" low. Adjust them to get back within ¼" or so of spec then tweak the TBs first to get the left-right leveled and then the pressures correct.
  18. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Point taken. Section A is really all about just measuring, so the order doesn’t really matter too much. I do mention in A4 that you shouldn’t do anything about too few graduations from L to H until you’ve also completed parts A, B and C. Some find that fixing pressures improves their...
  19. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    Never too early. Will toss some of that info in. My plan is at a tough crossroads between being comprehensive and succinct, but I think it's worth adding. If you have definite info, that would be great to know. Everything I have read says some need to remove it, others don't. Can't pick up on...
  20. LndXrsr

    The ABCs of AHC - How to Measure, Flush, and Adjust all in one place

    AHC Mods: Rear pressure adjustments in order of magnitude: - Adding/removing weight over rear axle: ~1.0MPa/210lbs - Rear sensor lift 1": +0.6MPa - New OEM AHC springs (95 lb/in): -0-0.3MPa depending on how worn the current springs are - 30mm spring spacers: -0.3-0.6MPa reduction - King KTRS-79...
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