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Home >> Ford >> 2002 >> Cutaway 7.3 F >> Repair and Diagnosis >> External Pages >> Different car >> Section 2453 (Rear Drive Axle/Differential - Ford 10.50-Inch Ring Gear -- F250-F350 Super Duty) >> In-Vehicle Servicing >> Drive Pinion Flange and Drive Pinion Seal >> Installation

Drive Pinion Flange and Drive Pinion Seal: Installation

WARNING: This page is about a different car, the 2008 Ford Pickup and 2008 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
  1. Lubricate the new pinion seal with clean long-life grease.
    2. NOTE: If the rear axle drive pinion seal becomes misaligned during installation, remove it and install a new seal. Failure to install a new seal will result in a fluid leak and possible component damage.
  2. Using the Drive Pinion Oil Seal Installer, install a new rear axle drive pinion seal.
    3. Fig 1: Installing Drive Pinion Seal
    G03884437Courtesy of FORD MOTOR CO.
  3. Lubricate the pinion flange splines with clean synthetic rear axle lubricant.
    4. NOTE: Disregard the scribe marks if a new pinion flange is being installed.
  4. Align the pinion flange with the drive pinion shaft.
    5. Fig 2: Aligning Pinion Flange With Drive Pinion Shaft
    GF0049192Courtesy of FORD MOTOR CO.
  5. With the pinion flange in place in the rear axle housing, use the Drive Pinion Flange Holding Fixture and Drive Pinion Flange Installer to install the pinion flange.
    6. Fig 3: Installing Pinion Flange Using Drive Pinion Flange Holding Fixture & Drive Pinion Flange Installer
    GF0049194Courtesy of FORD MOTOR CO.
    NOTE: Install a new pinion nut with the same color as the original if not replacing the collapsible spacer or damage to the component may occur.
  6. Install the new washer and pinion nut. Only hand-tighten the pinion nut at this time.
    7. NOTE: Do not loosen the pinion nut to reduce drive pinion bearing preload. Install a new drive pinion collapsible spacer and pinion nut if drive pinion bearing preload reduction is necessary. If a new collapsible spacer must be installed for pinion bearing preload reduction, install the nut supplied with the new spacer kit or damage to the component may occur.
  7. Using the Drive Pinion Flange Holding Fixture to hold the pinion flange, tighten the pinion nut to set the drive pinion bearing preload.
    • Tighten the pinion nut, rotating the pinion occasionally to make sure the drive pinion bearings are seating correctly. Take frequent drive pinion bearing preload readings by rotating the drive pinion gear with a Nm (lb-in) torque wrench. The final readings must be 0.56 Nm (5 lb-in) more than the initial reading taken during removal.
  8. Install the driveshaft. For additional information, refer to DRIVESHAFT article.
  9. Install the axle shafts. For additional information, refer to Axle Shaft .
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