If you don't know how to set up a diff, you will be money ahead to get a complete unit from a salvage yard. You can destroy $1000 worth of rear diff parts if they don't get set up correctly. The bearing pre load and pinion depth need to be right on. Very little room for error. Too loose and it will be noisy. Under heavy load you can have the same thing happen again. Bearings too tight, not enough gear backlash, and it will self destruct in a matter of a few minutes. LKQ salvage yards offer rebuilt rear axles for GM trucks, so they likely have one for yours. The next thing is stop using that tuner when you're hauling. The 7.3 may be able to handle it, but the rest of the drivetrain isn't up to twice the original power.
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Today's Featured Article - Old Time Threshing - by Anthony West. A lovely harvest evening late September 1947, I was a school boy, like all school boys I loved harvest time. The golden corn ripens well and early, the stoking, stacking,.... the drawing in with the tractors and trailers and a few buck rakes thrown in, and possibly a heavy horse. It would be a great day for the collies and the terrier dogs, rats and mice would be at the bottom of the stacks so the dogs, would have a busy time hunting and killing, all the corn was gathered and ricked in what we c
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