I have a ‘47 open diff banjo out of a pickup. Back lash and preload are good and ring and pinion are good. The problem I have is .012-.014” end play on the axle shafts when assembled. It’s not bad until cornering, then the drums rub on the backing plates. I see there is a thrust surface on the end of the axle that comes in contact with the carrier cross shaft. Could these surfaces be built up and machined? Or does one wear more than the other? Could I shim between the axle gear and the carrier to tighten it up?