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Well I talked to the guy that sales the shackels on ebay and he told me to make the hole to hole spacing for the shackels 9" the stock shackels are 5" I think a 4" increase is a lot so I am going to make a set at 9" and a set at 7.5" and see what looks better. The question that I have now is if I lift the front up 2.5" will the stock shocks work until I can get a new set.
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Thanks~ Kevin |
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Hi all... I have never lifted a superduty, but I have fooled with leaf spring trucks for years... If you are going to lift the truck with only shackles, the shackles need to be the lenth of stock shackle and then add 2x the lift you want. One inch of longer shackle is gonna lift the truck one half inch. This sometimes makes for a very long shackle, use your best judgement on this. The longer the shackle gets, the more unstable it will be without crossbracing of the shackle it's self. The longer shackle will change your pinion/driveshaft angle, and may or may not affect things, check it. As to the shocks, it's simple to check on your own, as you are doing the lift, or before. Suspend the truck solidly on jackstands by the frame, not on the axle houseing, and let the axle housing droop as low as it can, and unbolt your shocks. See how much further below the shock mount they can go, and this is the ammount of lift you can go to with out over extending the shock. However, this is not to say the axle can't droop further, it could if forced to, but hanging it is a good way to get an idea of how long the shock is/needs to be. IMO, adding a leaf from another truck would be a good way to get some lift, might stiffen up the ride, but it would be cheaper. New spring packs, might ride nicer, but gonna cost more. I would add the extra leaf, used, from some other truck, one of the longer ones, and maybe some mild shackles also, depending on what I thought it needed. Rough ride? Last I checked we were driving SuperDutys, big trucks come with a big ride... **grin** Good luck... Greg |
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Dieselcrawler, that was the info I was looking for. I guess thats why the guy told me to drill my holes 9" center to center. My stock shackles are 5" center to center. I tried to install my new shackle after work thinking it would only take an hour or so.... wrong. I got one stock shackle off but could not get the new longer one on. I had the frame supported and tried to push the spring down to bolt it on but it just wouldn't go so I had to give it up and put the stock shackle back on to try again someother time. It seemed like it would be real easy but I guess I need a small jack to jack the sprink down to the new hole location. Any other ideas are welcome. Brian |
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411: if you gotta use a jack or something to push the spring DOWN, you got a problem. Were you doing one side at time, or trying to put one longer shackle on one side while the other side was still stock and attached?
If I were doing what you are, putting on new shackles, I'd do this: 1-jack up truck, jack stands to the frame, let front axle droop, remove tires if they hit the ground before it's hanging only by the springs. 2-disconnect shocks at axle housing, and extend as far as possible, see how much farther below their mount on the axle they extend to, this is as far as you can lift the truck with out new shocks. Leave them dissconected. 3-use floor jack to hold axle houseing, and disconnect both shackles, and allow that end of both springs to drop the ammount needed to install your new, longer shackles. Sway bar may also cause some binding, or restrict movement in some way, you'll have to check that also. 4-if all is well, and your new shackles fit, bolt 'em up, let the axle housing hang again, and re-check the shocks. If ok, re-install, make sure all bolts are good and tight every where, get it back on the tires and off the jack stands, and see if you like your new ride hight.... Hope this helps... Greg |
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