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Once the axles are removed, loosen the two bearing caps, which hold the side bearing races in place. Mark the caps so you replace them on the same side. Now you need to loosen the side adjusters. Instead of using shims to hold the differential side bearings in place, the Chrysler 9 1/4 axle makes use of threaded adjustment spacers in the axle tube. These adjusters look the same as those in an 8 3/4 rear.