What heights are you at front and rear? Some rake is intentional. 1.25 inches is not too far from factory settings.Going to try this. Front end is about 1.25 inches lower than the rear, and I'm getting some tire rub on the windshield washer tank. Pressures are borderline normal on techstream so will plan on raising the front end about 0.5 inch and adjust torsion bars as necessary. Anyone else experience a sagging front end with AHC? 180k miles.
I was just reading up on this last night. Here's my semi-educated take.Height up front is about 19.25 and 20.5 in the rear, however the left was maybe .25 inches lower after I looked a little closer, and techstream had the FL at -0.3 and FR at 0 in N. I adjusted the torsion bars (13 turns L, 3 R) and got them both at 0, with the front pressure at 6.8, now the right side is lower!
I do remember reading that left/right discrepancies should be adjusted with torsion bars and checked by physical measurement and not techstream height, which is what I plan to do after I crank the right a bit and back off on the left.
Does this mean the height sensor is inaccurate and needs adjustment? F5 wheels on 285/75 btw. Thanks for the help!
You're welcome! Good timing as I was just reading through all that.That's very helpful thank you! I'll have to get around to this eventually. I read that entire thread but there's so much information I'll have to read it again.
This morning I made some torsion bar adjustments and got my front height and left/right height to where I want it. It's just over 19.5 up front and pressures are within spec.
I'll have to make those adjustments you mentioned at some point in the future, still have a bunch of maintenance stuff to do. Thanks for your help, this forum is great!
Looks like the parts diagrams only show the entire sensor arm with the rod. I'm guessing it's an M6 rod threaded opposite directions. Might be able to find a generic one and cut to size.I lost my threaded rod, (does anyone know the part number? Easiest place to order from? Thank you in advance.
Check pressures first and adjust torsion bars you already have.Question for the gurus here. This is such a cool discussion
I live in Australia and I have the 2006 4.2l turbo diesel engine lc100 sahara (which has ahc). The turbo diesel torsion bars are heavier rated than the V8 TBs as diesel engine is heavier.
In Australia we also had a non ahc 4.2l turbo diesel model ( called the GXL) This has slighly stiffer torsion bars than a ahc diesel model
I have an ARB deluxe bullbar and just fitted a warn m12000 (thankfully cnverted to synthetic rope) and arb steel roof rack. Ialso have a arn twin compressor in engine bay. I have fitted rear helper airbags which are billiant when the rear is loaded up - running 15-20psi
My vehicle has stock ahc suspension - tbs and springs
The M12000 has just been fitted - a week ago and the front end seems to have dropped a little. I dont even know what is going on with the spheres but its safe to say that they are probably out of range judging by the comments here. The vehicle indciates H when selcted but it doesnt seem as hi as usual (basic obs)
My cruiser like most is (apart from parts mentioned above) 99% unloaded, except when we do annual camping trip and it's really loaded up
So do I:
1. Get toyota to crank the tbs so the ahc spheres get back to spec? OR
2. Fit the torsion bars from the GXL model installed (which are slighlty stiffer) and get toyota to check the spheres and make sure (with all the weight in the front of my cruiser) that the pressures are correct?
Check pressures first and adjust torsion bars you already have.
I'd adjust it with a pretty full rig. If you adjust to a full rig you'll better avoid the ultimate ahc fear - failure on a trail.
I think the factory bars can do it, but they may need to re-index them (uninstall them, twist an extra tooth, reinstall). Spring rates might be a little weird, but you'll have to try and see!Thanks mate
Can you guys advise approximately how long does an 'adjust torsion bar - check pressure' take at a genuine toyota dealer who has the special ahc gauge?
Do you think with an ARB deluxe bullbar + Warn M12000 with synthetic rope, 2 baja designs soletk HID lights, arb twin comppressor and ARB steel roof rack, I'll be able to get enough adjustment out of the factory TBs to get the AHC pressures back down?
I've been quoted 2 hours.
Would 2 hours also be enough time to flush the ahc fluid? (Im not sure on ahc fluid intervals but my vehicle is coming up to 200,000km)
Really appreciate the knowledge in here on this issue
Did you end up doing this? Im gonna try it tomorrow and I just want an extra inch out of the front endGoing to try this. Front end is about 1.25 inches lower than the rear, and I'm getting some tire rub on the windshield washer tank. Pressures are borderline normal on techstream so will plan on raising the front end about 0.5 inch and adjust torsion bars as necessary. Anyone else experience a sagging front end with AHC? 180k miles.