An axle assembly for a heavy load vehicle comprising a housing, and an interaxle differential for distributing torque to a first axle and a second axle, wherein the interaxle differential comprises an input shaft and an output shaft each journaled in the housing and having a common rotational axis, the input shaft being journaled in relation to the output shaft, the input shaft for being connected to the first axle via a first gear wheel journaled in a first bearing about the input shaft, and the output shaft for being connected to the second axle, wherein the interaxle differential further comprises a differential spider and at least one pinion gear being rotatably mounted on the differential spider, the differential spider being rotationally locked to the input shaft, and the at least one pinion gear engaging with the first gear wheel and the output shaft, wherein the axle assembly further comprises a second gear wheel rotationally locked to the output shaft and engaging with the at least one pinion gear, wherein the input shaft is journaled in relation to the output shaft via a tapered roller bearing having a small end and a large end, at the small end the rollers of the tapered roller bearing have a smaller diameter than at the larger end, wherein the tapered roller bearing is arranged in a first bearing seat provided at an end of the input shaft, and a second bearing seat is provided in the second gear wheel, and wherein the large end of the tapered roller bearing is fluidly connected to the first bearing characterised in that a lubricant receiving space is provided in the housing, wherein the lubricant receiving space is fluidly connected to the small end of the tapered roller bearing by a first lubricant path extending through, or along, the second gear wheel from the lubricant receiving space to the small end of the tapered roller bearing, and wherein a second lubricant path extends along the differential spider, through a splined connection between the differential spider and the input shaft, from the large end of the tapered roller bearing to the first bearing. a housing, and an interaxle differential for distributing torque to a first axle and a second axle, wherein the interaxle differential comprises an input shaft and an output shaft each journaled in the housing and having a common rotational axis, the input shaft being journaled in relation to the output shaft, the input shaft for being connected to the first axle via a first gear wheel journaled in a first bearing about the input shaft, and the output shaft for being connected to the second axle, wherein the interaxle differential further comprises a differential spider and at least one pinion gear being rotatably mounted on the differential spider, the differential spider being rotationally locked to the input shaft, and the at least one pinion gear engaging with the first gear wheel and the output shaft, wherein the axle assembly further comprises a second gear wheel rotationally locked to the output shaft and engaging with the at least one pinion gear, wherein the input shaft is journaled in relation to the output shaft via a tapered roller bearing having a small end and a large end, at the small end the rollers of the tapered roller bearing have a smaller diameter than at the larger end, wherein the tapered roller bearing is arranged in a first bearing seat provided at an end of the input shaft, and a second bearing seat is provided in the second gear wheel, and wherein the large end of the tapered roller bearing is fluidly connected to the first bearing characterised in that a lubricant receiving space is provided in the housing, wherein the lubricant receiving space is fluidly connected to the small end of the tapered roller bearing by a first lubricant path extending through, or along, the second gear wheel from the lubricant receiving space to the small end of the tapered roller bearing, and wherein a second lubricant path extends along the differential spider, through a splined connection between the differential spider and the input shaft, from the large end of the tapered roller bearing to the first bearing.