This was Tim's response: Al,
According to the original Royale manual that I have. "Rear Axle: Semi-floating, Spiral bevel gear type. Ratio; Sedan and Victoria, 4.07 to 1, Coupe and special, 3.77 to 1. Pinion straddle mounted between double and single row ball bearings, shim adjusted. Differential bearings, adjustable tapered roller. Two tapered roller bearings at outer end of each axle shaft."
Tim