One problem related to driveshaft has been reported for the 2000 Mercury Grand Marquis. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2000 Mercury Grand Marquis based on all problems reported for the 2000 Grand Marquis.
I own a 2000 Grand Marquis with 41,000 miles and had to replace the drive haft. I was getting noticable vibration above 65. Drive shaft was bent. Vibration is gone but there is some low level noise from the rear end. Mechanic says it is the gears. I also own a 1999 Grand Marquis with the same optional equipment as the 2000. The 1999 has 71,000 miles and runs smooth and quiet.