One problem related to power train driveline has been reported for the 2001 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2001 Mercury Grand Marquis based on all problems reported for the 2001 Grand Marquis.
Underside of car covered with oil. Concrete driveway with many oil spots. Pinon gear seal was leaking. Replaced pinon seal.