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Home >> Ford >> 2009 >> Flex Limited, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 864 (Noise, Vibration And Harshness) >> Diagnostic Tests >> Noise, Vibration and Harshness (NVH) >> Component Tests >> Driveshaft With a Thump or Clunk Condition

Driveshaft With a Thump or Clunk Condition

WARNING: This page is about a different car, the 2007 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Inspect the vehicle to see if the driveshaft and skid plate have been updated.
  • If the vehicle has not been updated, carry out the entire procedure.
  • If the vehicle has been updated with a 4.0 inch aluminum driveshaft, and the vehicle has a clunk on acceleration or when hitting a bump, only carry out the fuel tank relocation steps.
    CAUTION: If new driveshaft bolts are not available, coat the threads of the original bolts with threadlock and sealer.
    NOTE: Inspect the driveshaft. If the vehicle has a 4.0 inch aluminum driveshaft, do not install another driveshaft.
    Fig 1: Locating Bolts On Driveshaft
    GF0003041Courtesy of FORD MOTOR CO.
  1. Remove the 3.5 inch steel rear driveshaft and install a 4.0 inch aluminum rear driveshaft. This will require a revised fuel tank skid plate, if equipped.
    • Index-mark the rear axle flange and transfer case flange to the yellow marks on the steel driveshaft. Remove the steel driveshaft. Using the index marks, align and install the new aluminum driveshaft.
    • Tighten to 111 Nm (82 lb-ft).
  2. Remove the fuel tank and the fuel tank skid plate. Refer to FUEL TANK AND LINES article.
  3. Remove the existing gusset.
  4. Install a new gusset, a new nut plate and new bolts.
    Item Part Number Description
    1 2L54-5097-BA Gusset
    2 F87Z-5A074-AA Nut plate
    3 W705613-S436 Gusset-to- crossmember bolts
    4 N803892-S60 Gusset-to-frame bolts
    • Torque the gusset-to-frame bolts to 90 Nm (66 lb-ft).
    • Hold the nut plate in place, then torque the gusset-to-crossmember bolts 40 Nm (30 lb-ft).
  5. Install the fuel tank and the fuel tank skid plate. Refer to FUEL TANK AND LINES article.
  6. Verify the condition has been corrected.