Most, if not all Dana 60's didn't use a crush sleeve to establish pinion bearing preload. They used shims.
Best way to remove/replace the companion flange without disturbing preload is to disconnect driveshaft, remove both rear wheels & brake drums/calipers & turn the companion flange with an inch/pound torque wrench to determine the rotating torque. Record this number. Next remove the pinion nut, belleville washer & pull off the old companion flange using the appropriate tools. Lubricate the new MW companion flange & install it on the pinion gear along with a new belleville washer & new pinion nut. Torque the nut down until you reach the same +/- rotating torque that you recorded from the original setup. In most cases you will need to tighten the nut to at least 250 foot/pounds or more to reach the desired rotating torque and not result in a differential assembly with a "loose" pinion nut....
Those of us with many years of experience setting up gears [correctly!] often use our hands to determine the rotating torque from the initial assembly. Newbys & novices should use measuring tools for best results...
When you're satisfied with the rotating torque value & you've reached at least the 250 ft/lb tightening number, you can reassemble the differential & road test!