We take the voodoo out of a rebuild on a GM 12-bolt rearend. To me, there were always two driveline components whose internal workings I've steered clear of-differentials and transmissions, their rebuilding, setup, and assembly have always been something of a mystery. Sure, I've always had a basic understanding of how they operate but I've, up to this point, always left these particular chores in the capable hands of professionals and never bothered to actually investigate what's really involved. Recently I had the opportunity to witness the step-by-step rebuilding of a GM 12-bolt rearend by one of SoCal's premier differential shops, Diff Works in Riverside, California, and the experience was an eye-opening one-one I'd like to share.

Photo Gallery: GM 12-Bolt Rearend Rebuild - Classic Trucks Magazine


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