Abstract: A lubricating system is for a forward bearing and a rear bearing of an input shaft of an interaxle differential. The interaxle differential includes a housing having an oil sump therein and a number of elements thereof capable of rotating within the housing to splash oil about the interior of the housing. The lubricating system includes supply ports through the housing respectively aligned with the bearings which are capable of supplying oil thereto by gravity flow. An interaxle differential casing is mounted on the shaft for rotation therewith between the bearings and has an outer surface which is coaxially aligned with the shaft. An oil removing device is aligned with the outer surface of the interaxle differential casing to remove oil therefrom during rotation. A first channel extends forwardly and downwardly from the oil removing device to the supply port of the forward bearing for gravity transfer of oil thereto.