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Mod | | | Forums66 Topics128,030 Posts1,055,430 Members48,422 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
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| | | | Joined: Apr 2010 Posts: 45 'Bolter | | 'Bolter Joined: Apr 2010 Posts: 45 | I have a 1948 3/4 ton. The suspension is 100% stock. Any advise on updating the old knee shocks to more modern shocks? I have seen shock mounts, but they are for the 1/2 ton.
Can some please tell me this is a cheap and easy fix?
| | | | | Joined: Feb 2008 Posts: 217 Shop Shark | | Shop Shark Joined: Feb 2008 Posts: 217 | This is what I did. I have a 46 1/2 ton that I converted to tube shocks from knee action. I got some lower front tube type shock mounts off an Advance design series (47-50something.) that was in a junk yard. The mount was in a straight up and down orientation, I've seen some that have an angle towards the front of the truck I guess the choice is up to you. Anyway, got the lower shock mounts mounted to the leaf springs and measured the travel. Then I got on the monroe web site and found a shock with that travel with posts mounts on both ends ( choices are post or fork mount etc). These turned out to be off a 53 vette.
I made some upper mounts off of flat steel, bent them into a 90, welded some webbing for added strengh, attached to the frame and been running that way for about 5000 miles.
This is just a suggestion that worked for me I can't say it will work for you. | | | | | Joined: Mar 2008 Posts: 1,775 'Bolter | | 'Bolter Joined: Mar 2008 Posts: 1,775 | The 47-55.1 AD trucks had basically the same front suspension. I wouldn't hesitate putting the 1/2 ton shock and mounts on a 3/4 ton. I looked in my LMC catalog and they had the same bracket and shock listed for the 1/2 and 3/4 ton for 50-55. Not to mention they used the same leaf spring setup from 47-55.1. Seems to me, it's a natural fit. | | | | | Joined: Apr 2010 Posts: 45 'Bolter | | 'Bolter Joined: Apr 2010 Posts: 45 | The 47-55.1 AD trucks had basically the same front suspension. I wouldn't hesitate putting the 1/2 ton shock and mounts on a 3/4 ton. I looked in my LMC catalog and they had the same bracket and shock listed for the 1/2 and 3/4 ton for 50-55. Not to mention they used the same leaf spring setup from 47-55.1. Seems to me, it's a natural fit. Thanks!.....(runs off to the LMC webpage....) | | | | | Joined: Apr 2010 Posts: 45 'Bolter | | 'Bolter Joined: Apr 2010 Posts: 45 | After much research, I cannot figure a way to get tube shocks on the rear of the 3600 without much fabrication. The front is indeed the same as a 1/2 ton. The rear however, is much different. The leaf springs are mounted out board of the frame. In a 1/2 ton, the leaf springs are directly under the frame.
I am open to suggestions. | | | | | Joined: Jun 2011 Posts: 420 Shop Shark | | Shop Shark Joined: Jun 2011 Posts: 420 | chevy s-10 has the lower shock mounts, that will work on the back and what I did was bolted a piece of angle iron between the frame rails and made my own upper shock mounts u can see in my pictures http://s629.photobucket.com/albums/uu14/kurtdh519/ all i did with the bottoms mounts was drill the u bolt holes closer so I could use my original springs | | |
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