How to Buy Junkyard Axles
Want to go even bigger? Try this Eaton full-floating axle out of ’62-’72 GM 3/4-tons. These 12 1/4-inch ring gear monsters have both a drop-out centersection (like a Ford 9-inch) and a removable rear cover. These axles use 1.55-inch-diameter shafts but are only 17-spline where they mesh with the differential. Ratios are 4.57s or 5.14s, and some ’69-’72 trucks had factory installed Detroit Lockers in them. (Tractech has discontinued this part—so you better find a used one.) Two-wheel-drive versions like the one shown came with trailing arms and coil springs, which is a great start if you want to get rid of your leaf springs. View Related Article
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