OK
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yea
- Thread starter egriff1975
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You can adjust that 'side' by cranking up the torsion bar (to a degree) and also by moving your height sensor.
Do you have Techstream?
Do you have Techstream?
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- #3
but i dont want to lift the entire side, do it ? wouldnt raising both the front & rear on the driver side just push the same problem around the truck ?
i mean, raising the entire side when just one corner is sagging would make the back of that side (which isnt sagging) higher than the other side of the back.....
right ?
i mean, raising the entire side when just one corner is sagging would make the back of that side (which isnt sagging) higher than the other side of the back.....
right ?
Front Side to side differences are adjusted on the torsion bars, I advise you get techstream so you can adjust the bars and keep everything in spec. This has been covered if you read others threads on how to adjust. Just go through it all. Make sure you have no leaks.
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Sorry to hijack. It sounds bad like I need techstream as well. Which one do I need?
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Definitive list of AHC maintenance items
It is a lot of reading, I would read it all as every conceivable question has been asked and answered, by the time you get to the end you will know alot about the system and techstream.
It is a lot of reading, I would read it all as every conceivable question has been asked and answered, by the time you get to the end you will know alot about the system and techstream.
You just need to cross-level is all. On the drivers side torsion bar, crank the bolt (30mm) clockwise to tighten. Start with 2 full rotations. Then, drive the vehicle around the block so it settles again and measure. Rinse and repeat until you have the front level. Recommend a cheap breaker bar and a good jack so you can crank the bolt without any weight on the spring/torsion bar.
This ▲▲
The FSM does a great job of lining out the correct order to setting up you AHC for best performance IMO. The only thing it lack as @geanes point out is when you "think" you have it correct you need to put it on the road and recheck your settings. Also it is much easier to adjust the 30mm torsion bolt with the vehicle jacked up. ILVAHC
Personally I’d advocate setting the system up as per the FSM - accurately determine heights at each corner; correct any side to side lean via equal and opposite adjustments (important) of the torsion bars to ensure balanced loading on the mechanical springs; check/adjust front and rear heights via height sensors and then set front neutral pressure with equal tightening or loosening turns on the torsion bars and correct rear pressure.
With a big lean like it sounds like OP has then you need to lower the high side and raise the lower side to try and keep the torsion loadings balanced. We don’t know if one side is 1 inch low (TB under loaded) or is the opposite side 1 inch too high (TB too tight)? Accordingly we split the difference to try and keep equal mechanical spring responses during compression/rebound.
Definitely makes sense. I remember when I cross leveled mine I de-tensioned one side and tensioned the other to balance. Figured it made sense to load each spring equally.
It is my understanding from reading through all the links posted above that torsion bar tweaking will not level an AHC equipped truck.
AHC owners turn the bars in order to get the system pressures within specification, not to level the front.
Non AHC owners turn the bars to level the front suspension.
The hydraulic system keeps the vehicle level based on the sensor positions (two up front, one in the rear). The torsion bars and the rear coil springs on AHC models are essentially “helper” springs, with the majority of suspension work being handled by the hydraulic system.
In short, you may have a problem with the front sensor or the associated circuit on the side that is drooping.
I have had good luck with this techstream cable with the software installed on a Windows 7 Craigslist special laptop https://www.amazon.com/Fangfei-Mini-Diagnostic-Scanner-Toyota/dp/B06XGB714M
AHC owners turn the bars in order to get the system pressures within specification, not to level the front.
Non AHC owners turn the bars to level the front suspension.
The hydraulic system keeps the vehicle level based on the sensor positions (two up front, one in the rear). The torsion bars and the rear coil springs on AHC models are essentially “helper” springs, with the majority of suspension work being handled by the hydraulic system.
In short, you may have a problem with the front sensor or the associated circuit on the side that is drooping.
I have had good luck with this techstream cable with the software installed on a Windows 7 Craigslist special laptop https://www.amazon.com/Fangfei-Mini-Diagnostic-Scanner-Toyota/dp/B06XGB714M
You most definitely adjust torsion bars to correct differences in front LH to RH heights aka correct cross lean or side to side lean. You also use the torsion bars to lower or raise front neutral pressure. All well explained in the relevant AHC diagnostic and maintenance procedures.
^^^^what Paddo says. He is the Oracle when it comes to AHC......trust me.
Your home work for tonight is to read it again.haha see you in four hours.
I will definitely do that! Obviously misread something. I do recall somewhere (maybe another forum) that the sensor setting will fight you on attempts to level with the t-bars.
