how much do shackles actual drop truck - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TotalChevy1 · 11-10-2007, 09:46 AM

The reason I'm asking is I'm trying to determine if I should go back to stock shackles and de-arch the spring to compensate for the lowering shackles. I've currently have the 1.5" shackles on the truck, but when I installed them I also took and 3 leafs from the stack and the truck dropped about two inches. I though I would get more like 3+ inches. As the truck sits know I'm trying to get an addtional 2 inches. My plan is to de-arch then, but I'm think that I could go back to the stock shackles and De-arch an addtional inch. Sorry this is so long. I guess my question is do the 1.5" shackles actual lower it 1.5 inches or ? on a c20?
Thanks

XXL · 11-16-2007, 10:39 PM

Generally speaking, a shackle will drop a vehicle half what the measured drop of the shackle is. Ex: for a 3" shackle, you will get a 1.5" drop. This is because you're only raising one end of the spring. The opposite end stays where it is... quick math says that halfway in between the two spring eyes, you will be "half dropped."

11-10-2007, 09:46 AM	#1
TotalChevy1 Registered User Join Date: Mar 2007 Location: Phoenix, Arizona Posts: 175	how much do shackles actual drop truck The reason I'm asking is I'm trying to determine if I should go back to stock shackles and de-arch the spring to compensate for the lowering shackles. I've currently have the 1.5" shackles on the truck, but when I installed them I also took and 3 leafs from the stack and the truck dropped about two inches. I though I would get more like 3+ inches. As the truck sits know I'm trying to get an addtional 2 inches. My plan is to de-arch then, but I'm think that I could go back to the stock shackles and De-arch an addtional inch. Sorry this is so long. I guess my question is do the 1.5" shackles actual lower it 1.5 inches or ? on a c20? Thanks __________________ 1972 c-20, 350/350, dana 60 w/456 gears(no Posi)

11-16-2007, 10:39 PM	#2
XXL Señor Member Join Date: May 2002 Location: Edge of the world Posts: 5,367	Re: how much do shackles actual drop truck Generally speaking, a shackle will drop a vehicle half what the measured drop of the shackle is. Ex: for a 3" shackle, you will get a 1.5" drop. This is because you're only raising one end of the spring. The opposite end stays where it is... quick math says that halfway in between the two spring eyes, you will be "half dropped." __________________ Craigslist \| ebay \| Engrishtees \| www.myattitudesucks.com \| Follow me on Twitter



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