With the carrier on the workbench, remove the ring gear bolts and use a deadblow hammer or a brass drift to drive the ring gear off the carrier. You don’t want to get any weld splatter on the gear teeth, as it can quickly destroy your axle gears. Thoroughly clean the diff and spider gears of any and all grease in a parts washer if you have access to one. If not, plan on burning through at least two cans of brake cleaner to get the job done. Don’t forget to use red Loctite when reassembling the ring gear to the carrier.