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Discussion Starter #1
I have an 81 4x4, with 3 inch springs up front. I want only an inch or so more lift, and wanted to make some longer shackles, but was told this would cause my pinion angle to be all fouled up and that I had to install shims as well. Is this true, or can I just get away with the longer shackles??? Thanks in advance.
 

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To get 1" lift, lengthen the shackles 2".
If it does mess with pinion angle or(more importantly)caster, installing shims is no big deal.
 

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Discussion Starter #3
caster?? not exactly sure what you mean by that term, excuse my ignorance, the reason that I didn't want to have to install shims is that if I have to fool with taking everything apart again, and paying for shackles & shims, then I nearly could have just bought new 4" springs. I was just wondering if anyone had installed longer shackles and it not affect anything adversly.
 

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Originally posted by 81hilux:
<STRONG>caster?? not exactly sure what you mean by that term, excuse my ignorance, the reason that I didn't want to have to install shims is that if I have to fool with taking everything apart again, and paying for shackles & shims, then I nearly could have just bought new 4" springs. I was just wondering if anyone had installed longer shackles and it not affect anything adversly.</STRONG>
Caster angle is the important one for steering stability (along with toe). Adding longer shackles will change the caster, about 1 degree for every 1" of extra shackle length. With the rear shackle setup, you'll be adding to your caster angle which is generally a "good thing" (TM) since it'll add to the stability of your steering. Having a little too much caster is a whole lot better than not having enough. Pinion angle up front should not be an issue unless you want to run 65 with the front hubs locked.
 

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He is correct, more caster caused by longer shackles will not even be noticable. Go for it, home made shackles and purchased shims will still only run under $40.00 max. If you are adding only 2" to the shackle, shims probably wont even be needed.
 

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i just added new longer shackles. they haven't screwed anything up. and they are awesome and i even built them! freeeeeeeee!!!! <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/biggrin.gif" border="0"> <IMG SRC="smilies/laughing.gif" border="0">
 

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Discussion Starter #7
cool! Thanks for the replies, no I don't run around in 4 wheel drive at speed whatsoever, so it would prob not be an issue at all. So 2" is what I need for a true 1" of lift. Now, if I may ask, how did you go about making the shackle?? I know where I can get some flat stock, and could probably get the holes punched pretty easily, but how did you connect the two pieces of flat stock, weld another piece of stock between the two, or what? Also, I noticed on a couple other posts about people buying them for 40 dollars or under, and all I've found are the conn-ferr shackles, which are like 70 bucks, and are 1.5 inches, which I assume would only give about 3/4" lift, so where are you all buying them from? Thanks
 

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Use STEEL shims, not aluminum. And replace the pins.
You don't HAVE to connect the 2 sides of the shackle .
 

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make the shackles plates out of 3/8 or 1/4 inch stock. I wouldn't buy them. It's too cheap to make your own. To buy shackles it would be around 100 bucks plus. Can make your own for around 25 bucks plus. 2" longer there is no reason to brace the center as long you use thick plates.
 

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here you go! i just got this from pmurf:

Unistrut couplers are either 6" long or 12" long.
They are used to join the U shaped channel called
unistrut which is used in commercial hanging and
supporting applications. It is the 10' long either
green or silver u shaped channel with all the oval
holes. We use it to hang lights, HVAC stuff, ductwork,
etc. at work. The couplers just let you bolt two
pieces together. Home Depot sometimes has them in the
electrical department if they carry unistrut. The 6"
couplers work perfectly for the double shackle. The
holes are right on and they are plenty thick.
Later,
Pat

hope that helps, there cheap...6 inches eye2eye would be 2.5 inches longer than stock, netting just a bit over 1" lift...
 

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I just bought mine front and rear from 4wheel parts, at $39 each, I also have 3" springs, went all weekend wheeling, and on some rocks, had no problems.
 
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