Ford Mustang (1999-2004) Service Manual: Installation

1. Inspect the pinion flange seal journal for rust, nicks, and scratches prior to installing the flange.

Polish the seal journal with fine crocus cloth, if necessary.

2. Lubricate the pinion flange splines.

  • Use SAE 80W-90 Premium Rear Axle Lubricant XY-80W90-QL or equivalent meeting Ford specification WSP-M2C197-A.

3. NOTE: Disregard the index marks if installing a new pinion flange.

Position the pinion flange.

Drive Pinion Flange and Drive Pinion Seal

4. Using the special tools, install the pinion flange.

Drive Pinion Flange and Drive Pinion Seal

5. CAUTION: Do not under any circumstance loosen the nut to reduce preload. If it is necessary to reduce preload, install a new collapsible spacer (4662) and nut.

CAUTION: Remove the special tool while taking preload readings with the Nm (inch/pound) torque wrench.

Tighten the nut to set the preload.

  • Rotate the drive pinion occasionally to make sure the differential pinion bearings (4630) (4621) seat correctly. Take frequent differential pinion bearing torque preload readings by rotating the drive pinion with a Nm (inch/pound) torque wrench.
  • If the preload recorded prior to disassembly is lower than the specification for used bearings, then tighten the nut to specification. If the preload recorded prior to disassembly is higher than the specification for used bearings, then tighten the nut to the original reading as recorded.
  • Refer to the torque specification for used differential pinion bearings in the Specifications portion of this section.

Drive Pinion Flange and Drive Pinion Seal

6. CAUTION: Align the index marks.

CAUTION: Install the driveshaft with new bolts. If new bolts are not available, apply Threadlock and Sealer EOAZ-19554-AA or equivalent meeting Ford specification WSKM2G351- A5 to the threads of the original bolts.

CAUTION: The driveshaft centering socket yoke fits tightly on the pinion flange pilot. To make sure that the yoke seats squarely on the flange, tighten the bolts evenly in a cross pattern as shown.

Connect the driveshaft.

Drive Pinion Flange and Drive Pinion Seal

7. Install the rear brake calipers.

8. Install the rear wheel and tire assemblies.

9. Lower the vehicle.

    Removal
    1. Raise and support the vehicle. 2. Remove the rear wheel and tire assemblies. 3. CAUTION: Remove the rear brake calipers to prevent drag during the drive pinion bearing preload adjustment. CAU ...

    Differential Housing Cover
    Removal 1. Raise and support the vehicle. 2. NOTE: Empty the lubricant into a clean container for reuse. Remove the differential housing cover (4033). 1. Remove the 10 bolts and drain the lubrica ...

    Other materials:

    Special Operating Condition Requirements
    When towing a trailer or using a camper or car-top carrier: Change engine oil and install a new oil filter every 4,800 km (3,000 miles) or 3 months. Change transfer case fluid every 96,000 km (60,000 miles). Change manual transmission fluid as required. ...

    Horn (Diagnosis and Testing)
    Refer to Wiring Diagrams Cell 44 , Horns/Cigar Lighter for schematic and connector information. Special Tool(s) 73 Digital Multimeter or equivalent 105-R0051 Inspection and Verification 1. Verify the customer concern by operating the h ...

    Driver and passenger airbags
    WARNING: Never place your arm or any objects over an airbag module. Placing your arm over a deploying airbag can result in serious arm fractures or other injuries. Objects placed on or over the airbag inflation area may cause those objects to be propelled by t ...