I realize that many people like you and I have written adds that call the differential case the carrier. That is what has led to the confusion. I believe your report is a technical report and would be best with the technically correct NAMES of the parts. On removeable carrier drive axles [pot, pumpkin, etc.] such as the Chrysler 8 3/4 inch when someone calls looking for a carrier they are usually looking for one of three common carriers. I am referring to 1960's muscle cars. On 67-69 Camaro when a call is received looking for a carrier it might be for a carrier [converting from 10 bolt to 12 bolt] or a diff case needed for changing the ratio. Many questions will need to be asked to clarify what part is needed. That is the confusion. Maybe I am just going stir crazy due to self isolating for two weeks.