Hello people. Hope sumone can help me I've got hold of a ib5 gearbox rear starter for my 2.1 zetec turbo. I also have s2 turbo gearbox with the LSD. I have striped both box's down no so I can fit the LSD in to the ib5. Would I have to use the crown off the old ib5 diff? Of is the rst the same? The rst one looks stronger. Hope someone can help. Thanks