The automaker told the National Highway Traffic Safety Administration (NHTSA) that hole was omitted "due to a programming error".
According to the safety agency, because the transmission gears are not properly lubricated, the gears will eventually break. NHSTA added that a groaning sound may begin to develop alerting the driver of the problem.
Subaru said dealers will repair the vehicles by drilling an oil lubrication hole and, if necessary, replace any damaged internal parts with new ones free of charge. The safety recall is expected to begin on or about August 6, 2010.
Help Line No. of the affected models owner can contact at 1-800-782-2783.