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Re: Basic suspension lift question (89 Burb V2500)
Pic 1 is a standard stock shackle
Pic 2 is a DIY flip shackle
Pic 3 shows what happens to the rear pinion when you install a shackle flip - it gets moved up and changes driveshaft geometry / internal lubrication. On a 4" lift it may or may not create a vibration - meaning you may or may not have to adjust the pinion angle back down with a shim kit or re-welding the perch. It may also cause the pinion bearing to get less lubricant - although I've never seen a problem with that.
The flip kit improves articulation and is supposed to improve / eliminate any rear axle/wheel hop.
More answers to your questions: http://www.offroaddesign.com/catalog/shacklekit.htm
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Last edited by Front Range; 11-20-2015 at 11:30 AM.
Reason: adding pictures
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