OEM Mercury Grand Marquis Axle Shaft

Mercury Grand Marquis Axle Shaft Parts and Q&A

• Axle Shaft, Rear
  6W1Z-4234-A
  Q: How to Ensure Proper Functioning of the Axle Shaft on a Mercury Grand Marquis?

  A:

  You should start the axle shaft service by turning off the Air Suspension system power at the left side luggage compartment switch to avoid unanticipated air spring behavior. Fire suppression system present in the vehicle should receive a command to depower. The procedure starts with caliper brake removal and Brake Disc removal before setting mechanic wire underneath the caliper to store the rear brake anti-lock sensor. The differential pinion shaft removal begins with the lock bolt removal followed by removal of the differential housing cover. Do not break any parts of the differential pinion gears when you undertake this procedure. Push the axle shaft toward the inside and finish by taking out the U-washer from its position. Secure the pinion shaft lock bolt by finger-tightening it after pushing the axle shaft outboard. You should exercise caution when handling the wheel bearing oil seal during both axle shaft installation and removal. Apply lubrication to the wheel bearing oil seal lip before putting on the axle shaft and verify that the U-washer rests correctly in the side gear. The last installation steps require hole alignment of differential pinion shaft with the lock bolt hole and proper bolt torque to 30 Nm (22 ft. lbs.). After this, reinstall the differential housing cover and the rear brake anti-lock sensor while tightening to 7 Nm (62 inch lbs.). Repower the vehicle through its fire suppression system before putting back the rear Brake Caliper and brake disc.
• Axle Shaft
  F8AZ-4234-CA
  Q: How to service and repair the axle shaft on Mercury Grand Marquis?

  A:

  The first step for servicing an axle shaft involves unthreading the lug nuts while avoiding heat application because it leads to wheel damage and affects rear wheel bearings. Using the vehicle weight on the wheels, proceed to loosen the lug nuts further after removing the center cap. The right-hand kick panel contains the air suspension switch which needs to be switched off to disable the air suspension system in vehicles that have rear air springs before raising the vehicle for service. Disassemble the rear wheel and tire assembly beginning with removing lug nuts and proceeding to pull out the assembly itself. Begin by untightening the 10 bolts from the differential housing cover while draining all lubricant from the rear axle housing. Clamp off the rear brake anti-lock sensor and move on to detach the rear Brake Caliper and Brake Disc. Differential pinion shaft removal demands careful handling since differential case or axle shaft rotation could trigger pinion gears to escape and generate harm. Erase the differential pinion shaft lock bolt before proceeding to unfasten the shaft. The U-washer needs removal only after pushing the axle shaft inboard until it clears the rubber O-ring groove. Secure the pinion shaft lock bolt by first tightening it with fingers only after repositioning the differential pinion shaft by moving outboard with the axle shaft. When taking out the axle shaft prevent any damage to the wheel bearing oil seal. The first step of installation requires Premium Long-Life Grease XG-1-C or an equivalent that meets Ford specification ESA-M1C75-B for lubrication on the wheel bearing oil seal lip. After repeating the differential pinion shaft removal process, avoid damaging the oil seal during axle shaft replacement. Position the U-washer onto the button end of the axle shaft and after pulling the shaft outward the U-washer will automatically fit into the side gear. Position the differential pinion shaft before aligning its lock bolt hole orientation and tighten it with the lock bolt. The procedure continues by putting back the brake disc and caliper followed by the rear brake anti-lock sensor. The motorist must place the differential housing cover in position and add the recommended liquid lubricant to it. The wheel mounting surfaces must be completely cleaned to remove corrosion and dirt which will ensure proper metal contact between surfaces in order to prevent wheel nut loosening. Conclude the repair process by adding the wheel and tire elements together with the center cap followed by activated air suspension systems through the air suspension switch starting the lowering process of the vehicle.