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Home >> Lincoln >> 2000 >> LS 3.9 A >> Repair and Diagnosis >> External Pages >> Different car >> Section 1255 (Rear Drive Axle/Differential - Ford 10.50-Inch Ring Gear -- F250-F350 Super Duty) >> In-Vehicle Servicing >> Differential Case >> Installation >> Backlash not within specification

Backlash not within specification

WARNING: This page is about a different car, the 2007 Ford Pickup and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Bearing Caps
GF0006505Courtesy of FORD MOTOR CO.
  1. To increase or decrease backlash, remove the bearing caps and install a thicker shim and a thinner shim as shown.
    • If backlash is not within specification, correct by increasing the thickness of one differential bearing shim and decreasing the thickness on the other differential bearing shim by the same amount.
    2. Fig 2: Bearing Cap Bolt
    GF0006503Courtesy of FORD MOTOR CO.
  2. Install the bearing caps and bearing cap bolts.
    • Tighten to 119 Nm (88 lb-ft).
    3. Fig 3: Rotating Differential Case
    GF0006492Courtesy of FORD MOTOR CO.
  3. Rotate the differential several times to make sure the differential bearings are correctly seated.
    4. Fig 4: Measuring Ring Gear Backlash Using Special Tools
    G03884451Courtesy of FORD MOTOR CO.
  4. Using the special tool, recheck the backlash.
    • If backlash is within specification, go to Backlash within specification in this procedure. If not, repeat Step 8.
    • The specification shown is the full allowable range. For the preferred range, refer to Specifications.
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