I took more than a year and a half to get my front disc brake project and my overdrive transmission project to be finished and working as they should. I had three days with lots of time playing with and enjoying my new toys. Yesterday while driving it felt like I ran over something big, but there was nothing there. Next there was a bigger bump, still with nothing there. I stopped and looked around the differential but found nothing wrong. When I got back home I determined to put it back on blocks and leave it there until I find out what is wrong. It did not take long to find that I lost a shackle. I bought new rear springs during 12-2023 then installed them during 3-2024, so they are not old and do not have a lot of use on them. I retraced my route 3 times but did not find the pieces, so I do not know why I lost it.

Tomorrow I will order another shackle kit from the supplier and try again.
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IMG_0662.jpg (243.38 KB, 249 downloads)
IMG_0663.jpg (250.84 KB, 247 downloads)


1950 GMC 100 Panel Truck, 1958 270,
3-spd Saginaw with BW OD,
3.73 12 Bolt Differential from a 1966 C10,
Front Disc Brakes
Bought it in pieces 9-1976, driving since 6-1978
Follow in the DITY