A lubrication system for a spline interface (20) includes at least one debris chamber (46) located radially outboard of the spline interface (20) of a first rotating component (16) and a second rotating component (18). Wear debris (44) is urged from the spline interface (20) toward the at least one debris chamber (46) by rotation of the first and second rotating components (16, 18) about a central axis (14). At least one lubricant reservoir (36) contains a volume of lubricant (40), wherein at least a portion of the volume of lubricant (40) flows toward the spline interface (20) in response to the wear debris (44) being urged from the spline interface (20) toward the at least one debris chamber (46).