1998 Mercury Grand Marquis Q&A
1998 Mercury Grand Marquis Question: Brakes and front & rear? Need to be replaced at same time?
Usually its a good idea to replace both front and rear at the same time - Valleyautotech
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.