[Brian]

To add to what John Hulley has written; as he says, engineering practice dictates that one surface is a press fit, whereas the other is a slip fit. The rule is; if the housing is fixed and the spindle rotates, the press fit will be on the spindle.
Conversely, if the spindle is fixed, and the housing rotates, the press fit is in the housing.
Think he front hubs on your Ford; the bearings are a press fit in the hub [which rotate], and a slip fit over the stub axle.
Whereas, in the transmission, the shafts turn, consequently the press fit of the bearings is on the shafts, and the bearings are a slip fit into the housing.