Gathering parts for drop and front suspension rebuild... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

r8rs4lf · 02-10-2026, 04:25 PM

So I heard if our trucks have the original suspension parts, we should assume that there's already 1" of sag. Is that a safe assumption?

Looking to do a 2/4 but I'm thinking maybe I should add another inch.

Looking to do 2.5" drop spindles with 2" drop springs
Rear would be 5" drop leaf springs.

Should I do 6" in the rear to account for the 1" of sag?

Not looking to notch the frame.

All suspension components are going to be changed up front at the same time.

02-10-2026, 04:25 PM	#1
r8rs4lf Registered User Join Date: Jan 2007 Location: 310 Posts: 116	1" sag on a 54 year old suspension? So I heard if our trucks have the original suspension parts, we should assume that there's already 1" of sag. Is that a safe assumption? Looking to do a 2/4 but I'm thinking maybe I should add another inch. Looking to do 2.5" drop spindles with 2" drop springs Rear would be 5" drop leaf springs. Should I do 6" in the rear to account for the 1" of sag? Not looking to notch the frame. All suspension components are going to be changed up front at the same time. Last edited by r8rs4lf; 02-11-2026 at 11:43 AM.



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