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Are the axle shafts hollow like the ones on my 928? If so cleaning the joints is a breeze. Submerge the joint, sans boot and all the grease you can wipe off, in container of mineral spirits. Connect a compressed air hose to the top end of the shaft so as to direct the air down through the center of the shaft and into the joint so as to agitate the solvent. Turn the air pressure way down so as to not splash the solvent everywhere. Come back in an hour and the joint will be completely free of the old grease. Rinse with brake cleaner or other volatile solvent to remove the mineral spirits before packing and booting the joint.
Mike
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