Author Topic: Been Doing Some Jacking Today  (Read 2835 times)

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Offline Juls~X

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Been Doing Some Jacking Today
« on: July 09, 2007, 19:00:39 »
The time has come, I thought. Well there's a trial for me on Sunday and I wanted a bit more height and so I wound up my torsion bars - except that I didn't just wind them up exactly primarily because one was wound up further than the other so......


First job was to jack up the truck and put the axle stands under - had to put them behind the gearbox cross-member otherwise they'd get in the way of the job  ;)

Wire brush all the muck off the ends of the torsion bar bolts - then undo them completely

Measure them at the point where they are no longer under torsion:

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Which worked out to be 60mm (this should be standard on all models)

Once the torsion bar is loose you then have to undo all 4 bolts on the gearbox cross-member - CAUTION only work on one side at a time and put the bolts back once you have finished that side!

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Pull back the rubber gaiter on the front of the torsion bar

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The torsion bar will now pull out of it's socket

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Now index the torsion bar around - clockwise on the left hand side (looking to the front) and anti-clockwise on the right hand side (looking to the front)

The amount to index is calculated as follows:

Distance from pivot point to bolt/measuring point on torsion bar = 120mm

Distance from torsion bar to lower ball joint on wishbone = 400mm approx

Ratio = 3:1 approx which means every 1mm movement on the bolt moves the suspension by 3mm

So I indexed the torsion bar by 20mm allowing me a 60mm lift

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So the total amount is 80mm - note the jack used to lift the torsion bar into place and ease the pressure on the bolt while I was tightening it

Finally adjust the bolt so that the final measurement on the torsion bar is 20mm

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Lasst job is to refix the gearbox cross-member bolts and fit the front gaiter into place.


Repeat for the other side
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