Dakar HELP!

[IH8Wood]

In a spring under setup the drive shaft is the hypotenuse. As you lift the rig the distance from the t-case to the fixed spring hanger stays equal. (adjacent side) and the distance from the fixed hanger to the center pin of the spring pack stays the same (opposite side)

If opposite and adjacent do not change and but the angle between them is reduced, the hypotenuse must be reduced as well.

So as the springy thing arches, Mr slip yoke compresses?

 

[lowenbrau]

So as the springy thing arches, Mr slip yoke compresses?

yep

 

[Tapage]

yep

viceversa in shackle reversal aplication on front axles .. right . ?

 

[89s rule]

same here ..

put it in the axle before on shackles ..

That's what he did, in those pictures its already mounted and he is setign the axle back on the springs.

 

[lowenbrau]

viceversa in shackle reversal aplication on front axles .. right . ?

I'd say so, yup

 

[Cascade Cruiser]

umm, you are doing both sides at once right?
when i did the springs on my 55 i strapped a 2 ton hiost to my rear bumper and pushed the truck around as needed, left the rear axle sitting on jackstands.
good luck, carl

Fng55 is right on. I struggled with the spring seat/u-bolt alignment earlier this evening until I realized that I needed to remove the u-bolts on the opposite side of the axle in order to achieve the necessary range of motion to gain proper alignment. I also found it helpful to lift the other tire off the ground so that the rear axle is essentially "floating" on a couple of jacks and only constrained by the driveshaft connection. You wouldn't want to disconnect the driveshaft because this is a good constraint. Spring seat/u-bolt alignment can then be achieved with a little nudging by hand, no tow straps or bottle jacks required. Works just fine w/ shackles and spring hangers connected as directed by the FSM. Just don't torque down the u-bolts until the other side of the axle has been aligned as well.

CC

 

[High Desert]

More information for this old post..

I loosened the ubolts on the oppisite side ( jacked up w/ wheel off ), pulled the drive shaft zerk, (big mess of grease came out) used my foot and pushed every thing in alignment. Then I did not tighten up the new ubolts till I did the other side. I've read where if you take the oppisite side ubolts off it is harder to line it all up. Too much play in the whole thing...I dunno, loosening worked fine for me, no come-alongs, no help.

I too put the spring pack on the axel and jacked it up to placement.

 

[dogboy2]

lowenbrau has a good point re: the compression of the slip yoke

Ditto on removing the grease zirk on the driveline to allow the slip yoke to compress. This was the easy solution to the same install problem with my OME lift as suggested by a tech rep at ARB. It worked beautifully and the rears went on without too much pain or having to remove the driveshaft.

You can use your OEM bottle jack to bring the spring pack up to the spring perch if you've bolted the shackle brackets. Just leave everything a little loose until you get it all in place and aligned, then go back and torque everything to spec.

-dogboy- '87 FJ60

 

[dogboy2]

son-of-a..... I guess I should have checked the date of the original post. Oh well, hope the info is helpful to someone else...

-db-