65-C20 Assembly question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

GreyFox · 10-08-2025, 02:56 PM

Getting started on reassembly and the rear axle seems off after I attached the springs to the Trailing Arms. Is there a particular position for the spring to be attached to the frame or the Trailing Arm?

Look closely at the springs - They seem like the Left one (Top Picture) is looking more tilted toward the left and the Right one seems a little tilted to the left.
Do you see the tilt?
Should I make they look more Vertical?

Let me know,

John

Keith Seymore · 10-08-2025, 04:21 PM

I would measure from the brake backing plate (or the lip of the drum) and make that the same on both sides.

I would also do that with weight on the axle, not hanging.

K

Short 3/4 · 10-08-2025, 11:09 PM

I also feel that the problem is the lack of weight. As the frame moves closer to the rear axel the locating arm will push the axel housing towards the passenger side. That rear suspension setup had some truly weird geometry in rough terrain, which is probably why it wasn’t used for the 4x4 models

10-08-2025, 02:56 PM	#1
GreyFox Registered User Join Date: Dec 2017 Location: Forest Grove OR Posts: 16	65-C20 Assembly question Getting started on reassembly and the rear axle seems off after I attached the springs to the Trailing Arms. Is there a particular position for the spring to be attached to the frame or the Trailing Arm? Look closely at the springs - They seem like the Left one (Top Picture) is looking more tilted toward the left and the Right one seems a little tilted to the left. Do you see the tilt? Should I make they look more Vertical? Let me know, John Attached Images

10-08-2025, 04:21 PM	#2
Keith Seymore Registered User Join Date: May 2009 Location: Motor City Posts: 9,490	Re: 65-C20 Assembly question I would measure from the brake backing plate (or the lip of the drum) and make that the same on both sides. I would also do that with weight on the axle, not hanging. K __________________ Chevrolet Flint Assembly 1979-1986 GM Full Size Truck Engineering 1986 - 2019 Intro from an Old Assembly Guy: http://67-72chevytrucks.com/vboard/s...d.php?t=342926 My Pontiac story: http://forums.maxperformanceinc.com/...d.php?t=560524 Chevelle intro: http://www.superchevy.com/features/s...hevy-chevelle/

10-08-2025, 11:09 PM	#3
Short 3/4 Registered User Join Date: Jan 2017 Location: Los Osos Ca Posts: 616	Re: 65-C20 Assembly question I also feel that the problem is the lack of weight. As the frame moves closer to the rear axel the locating arm will push the axel housing towards the passenger side. That rear suspension setup had some truly weird geometry in rough terrain, which is probably why it wasn’t used for the 4x4 models __________________ 65 short stepside K10 292-SM420-T221 8 lug closed D44 front NoSpin HO72 4.10 rear



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