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adjusting torsion bars

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adjusting torsion bars

Postby andrewward » Sun Jan 31, 2010 5:02 am

Hi how do I adjust torsion bars ? do I need to jack the truck ? how many turns on the bolt for how many mm ?, thanks
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Re: adjusting torsion bars

Postby geeves » Sun Jan 31, 2010 5:44 pm

First a day or 2 before you adjust spray the thread on the adjuster nut with your favourite brand of penetrating oil.
Disconnect one side of the sway bar (this is to make sure you lift both sides evenly)
Jacking the truck does make adjustment a lot easier but is optional
Wind each side in about 2 turns and remeasure. Adjust again as needed
Reconnect sway bar
Adjustment is a little at a time so takes a while
Factory adjustment is when the front axles are horizontal.
If you lift by 50mm or more you need to do a ball joint flip as well
Get a wheel alignment by your local tyre shop and make sure they do camber and castor (they forget these as most modern cars are not adjustable)
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Re: adjusting torsion bars

Postby 98Rodeo » Mon Feb 01, 2010 12:46 pm

i am looking into lifting my rodeo soon,
how do u go about reindexing the bars? does this help retain the normal stiffness and not make it a harsh ride when u jack it up?
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Re: adjusting torsion bars

Postby geeves » Mon Feb 01, 2010 4:01 pm

The spring rate remains the same so no difference in stiffness. Stiffness occurs when you run out of travel between the bump stops. This is one of the things a ball joint helps as can cutting bump stops. Be carefull doing this as too much downwards travel weakens your cv joints
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Re: adjusting torsion bars

Postby turnturn » Mon Feb 01, 2010 6:34 pm

Some of the better wheel alignment places will also have the abilty to corner weigh your vehicle for proper height adjustment and weight distribution. Possibly a bit of overkill on a Mu.
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Re: adjusting torsion bars

Postby andrewward » Wed Feb 03, 2010 10:05 pm

I am re-adjusting the height to the original factory settings, does anyone know the correct height, I was told on my 2.8
from roof top to floor is 1695, but I need a more accurite measurment for front and rear recpectively considering the factory size wheels 10.5x31 R15,thanks
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Re: adjusting torsion bars

Postby jellis » Tue Jul 10, 2012 11:46 am

i wound up my torsion bars the other week and its now.
really really bouncy any ideas?
also the 35's are scrubbing with the minor cutting i have done how much adjustment would there be in the castor to pull them forward?
cheers, Josh
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Re: adjusting torsion bars

Postby geeves » Tue Jul 10, 2012 3:01 pm

How is it sitting between the bump stops? If its too high it will be touching the bottom stop which is causing the bounce. Ball joint flip and maybe a spacer should help but if you are that high bump steer can also be an issue due to the angles on the tie rods A steering damper will help but not fix this completely Also your cv angles will cause breakages unless you lower the diff
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Re: adjusting torsion bars

Postby jellis » Wed Jul 11, 2012 4:58 pm

geeves il get some pictures tonight.
its bad enough for me to want to drop it back down and run road tyres again. :cry:
i didnt think i wound it up more than 2" but maybe i did.
it goes everywhere i point it with the 35's tho
cheers, Josh
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Re: adjusting torsion bars

Postby Captcol » Wed Jul 18, 2012 7:56 pm

Make sure the front is not higher than the rear, and that both sides are the same after a test drive, due to loading the back of the truck with recovery gear the front ended up to high and foursome reason the left front dropped and the handling turned to crap
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Re: adjusting torsion bars

Postby jellis » Thu Jul 19, 2012 9:33 am

The front is definatly higher than the rear.
Will fix that this weekend tho

IMG_0947.JPG


cv angel does not seem to bad. thoughts?
You do not have the required permissions to view the files attached to this post.
cheers, Josh
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Re: adjusting torsion bars

Postby isuzurob » Thu Jul 19, 2012 7:57 pm

That outside cv will handle it but its getting quite steep for the inner cv, if you drive sensible it should be ok
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