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Wheels, Tires, Suspension and Brakes Keep them doggies rollin', rawhide

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  #1  
Old July 5th, 2022, 12:58 AM
Simonsays Simonsays is offline
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Default 66 1500 rear shackle bushings

Alright got a 1966 1500 3/4 ton truck, has 2750 lbs leafs HD. Got a new set of eaton 2000 lbs leafs standard Duty for 3/4 ton trucks. They are new and came with bushings installed. Question is what are the bushings that attach to the shackle and frame it self? Are they the same rb70 bushings the springs use? Any help would be appreciated. Thanks.
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Old August 26th, 2022, 05:55 AM
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Default Re: 66 1500 rear shackle bushings

Any help would be appreciated. Thanks. Still can't seem to find the answer. Seems like the 66 3/4 ton was a weird year.
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Old August 26th, 2022, 04:54 PM
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Default Re: 66 1500 rear shackle bushings

When I did my bushings I had to take them down to the local auto parts store and have a gray-hair look through a book to find something that matched. Mine was the front so not much help here, but that's what I'd do. Find the guy with the most seniority and see if he knows how to look stuff up in a book. He'll measure it six ways to sunday then look up something that works.
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Old August 26th, 2022, 05:16 PM
lizziemeister'sV6 lizziemeister'sV6 is offline
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Default Re: 66 1500 rear shackle bushings

Or you could remove a couple leaf springs from each spring if you want to ease the stiffness of the ride or the height of the truck. Depends too if your spring bushings/brackets are bad enough to warrant replacement - if they're good I myself would just remove springs till I achieve the desired ride and height -
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Old August 30th, 2022, 04:43 PM
gmcjuniorvan gmcjuniorvan is offline
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Default Re: 66 1500 rear shackle bushings

The bushing came with the shackle. You can either press out the bushing and measure it or try to measure it in the shackle.

Rubber Incased Bushing Type 1 https://www.truckcomponentsonline.co...-1_c_1137.html
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File Type: png GMC Truck Rear Spring Shackle.png (414.6 KB, Multiple views, 1 clicks)

Last edited by gmcjuniorvan; August 30th, 2022 at 04:49 PM.
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