Basic suspension lift question (89 Burb V2500) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Front Range · 11-20-2015, 11:30 AM

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

11-20-2015, 11:30 AM	#3
Front Range Registered User Join Date: Jun 2014 Location: Longmont, Colorado Posts: 252	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 Attached Images __________________ Folks that throw dirt on you aren't always trying to hurt you, and folks that pull you out of a jam aren't always trying to help you. Last edited by Front Range; 11-20-2015 at 11:30 AM. Reason: adding pictures



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