Author Topic: 80 PU shackle angle  (Read 1472 times)

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mjos

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80 PU shackle angle
« on: Jan 19, 2007, 03:57:12 PM »
I've installed some stock length Procomp 4" lift rear springs(I know...I know, but they were free) and 2" longer rear shackles.  The problem is that my shackles sit verticle with the weight of the truck resting on them.  I of course have a crappy rear ride because of this.  I assume I want the shackles to be pointing at about a 45deg angle away from the rear tires.  Any easy fixes for this situation besides cutting off the stock rear hangers and moving them forward?  I will eventually be getting longer rear lift leafs and new mounts but until then, I need to make do with what I have.  Suggestions?

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jimbo74

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Re: 80 PU shackle angle
« Reply #1 on: Jan 19, 2007, 04:03:04 PM »
procomp is known for not having the best springs... however, have they settled any yet? if not, jsut flex it out, and it should be fine, or take out leaves, but that will decrease lift

basically, you need to either reduce lift, let the springs sag, or move the hanger forward
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kneedownnate

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Re: 80 PU shackle angle
« Reply #2 on: Jan 19, 2007, 07:42:03 PM »
I've installed some stock length Procomp 4" lift rear springs.  The problem is that my shackles sit verticle with the weight of the truck resting on them. 

I highlighted your absolute limiting factor.  Short of moving the rear mount there's really no way to fix this problem.  The problem with cheap lift springs is they are often the same length springs, which cause a bad shackle angle when built with a higher arch.  A proper lift spring will have a longer main leaf (same distance eye to eye, longer laying a tape along the leaf) and will not suffer these issues.
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Re: 80 PU shackle angle
« Reply #3 on: Jan 19, 2007, 08:18:15 PM »
Someone told me that the rear springs on the 88 4Runner in my garage were longer than the pickup's. I measured the rear springs on the 4Runner & measured the rear springs on the 81 flatbed in my driveway & found that the 4Runner springs were 1" longer. I also measure the distance from the front hanger to the rear hanger & found that the 4Runner mounts were mounted 1/2" further back. Please, anyone  correct me if I'm wrong but if this is true, find a set of stock 4Runner springs from at least an 88 & swap the top leaf. That will help your shackle angle.  :thumbs:  I  :dunno: if the 86-87 springs are longer since I cut off the front mount on my 87 4Runner & mounted Chevy's.   
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freeze365

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Re: 80 PU shackle angle
« Reply #4 on: Jan 19, 2007, 08:19:27 PM »
I had that same problem when i was running the Pro-Comp 4" lift and it was horrible!  The best thing is either take leaves out of the pack and use stock shackles or get the Marlin kit  :thumbs:
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kneedownnate

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Re: 80 PU shackle angle
« Reply #5 on: Jan 20, 2007, 10:02:00 AM »
Marlin rears a CHEAP right now too :thumbs:
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yotaboy79

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Re: 80 PU shackle angle
« Reply #6 on: Jan 22, 2007, 07:00:08 PM »
your only options are to relocate the rear hanger, get longer springs, use a shorter shackle or swap out the main leaf in the packs to a 3rd gen main leaf, the 3rd gen rear springs are longer

 
 
 
 
 

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