Wear on rear axle shafts may cause excessive play and gear oil leaks on Mercury Grand Marquis

Wear on the rear axle shafts near the bearings can create excessive play and lead to gear oil leaking past the seals. Gear oil will leak onto the brake backing plate, brakes, and wheels.
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Average mileage: 118,394 (55,000–172,000)
4 model years affected: 1990, 2000, 2002, 2003
16 people reported this problem
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Viewing 1 - 11 of 11 problem details
2003 Mercury Grand Marquis 105,000 mi,
rear end started leaking. added 1.5 quarts of oil before full. just starting the repair process. looking for help
Same problem cost me $700 to get it fixed had to have a new axel!!!!!!! 11111111111111111111
2002 Mercury Grand Marquis 159,000 mi,
small rear diff leak
leakage, and virabration in seats. thanks
2002 Mercury Grand Marquis 172,000 mi,
gear oil leaking driver side rear
2002 Mercury Grand Marquis 55,000 mi,
Rear axle seal on drivers side is leaking all over the back of the wheel and brakes.
2003 Mercury Grand Marquis 76,000 mi,
Seal leaked causing axle to wear. Grindings caused damage in fluid so entire rear axle assembly required replacement. Ford has poor soft rear axles on this model.
2002 Mercury Grand Marquis 123,000 mi,
I bought this car with 123,000 miles, within 20,000 miles I had to replace the rear axle's and the had to have the rear end cleaned $1,ooo.oo . I travel a lot so I thought I should be good!? no, I now have 280,000 miles with in 3 years, the rear axles and read end have been replaced 3 times and I have to do it again and this will make 4. the front shocks (bad problem) removed and replaced, heater repaired 2 times..... I love the car but what the heck, they need to do better than this. All of the repairs are way to expensive and the makers should give my money back so I can get a car that is worth driving long distance
My whole back and front brake system was changed down to the calibers and its been almost a year and no problems with that area of the car
1989... same problem resulting in a bent axle.