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Neutralize Powertrain and Exhaust - Automatic Transmission

WARNING: This page is about a different car, the 2004 Ford Ranger. However, it is still accessible from the selected car via links, so may be relevant.
    NOTE: It is normal for a 4-cylinder engine to have a nominal level of powertrain boom, vibration or rough idle. Compare the concern vehicle to a similar Ranger vehicle to determine if the level of boom, vibration or rough idle is normal before proceeding with any repairs.
  1. Road test the vehicle to verify the condition.
  2. With the vehicle in NEUTRAL, position it on a hoist.
  3. Loosen the catalytic converter-to-muffler exhaust flange fasteners.
  4. Loosen the 4 engine support insulator nuts.
    Fig 1: Loosening Engine Support Insulator Nuts
    G03272064Courtesy of FORD MOTOR CO.
  5. Loosen the 2 transmission extension housing-to-crossmember mount nuts.
    Fig 2: Loosening Transmission Extension Housing-To-Crossmember Mount Nuts
    G03272065Courtesy of FORD MOTOR CO.
  6. Loosen the 2 exhaust manifold-to-catalytic converter nuts.
  7. Start the engine.
  8. Apply the park brake and the service brake, then place the transmission into DRIVE.
  9. Raise the engine RPM until the powertrain moves or shifts under torque.
  10. Place the transmission into REVERSE.
  11. Raise the engine RPM until the powertrain moves or shifts under torque.
  12. Repeat Steps  8 - 11 .
  13. Place the transmission into PARK and turn the ignition switch to the OFF position.
    14. NOTE: Support the catalytic converter and exhaust pipe with a jack stand while tightening.
  14. Tighten the powertrain and exhaust system fasteners in the following sequence:
    1. Tighten the 2 LH engine insulator nuts to 102 N.m (75 lb-ft).
    2. Tighten the 2 RH engine insulator nuts to 102 N.m (75 lb-ft).
    3. Tighten the 2 transmission extension housing-to-crossmember mount nuts to 99 N.m (73 lb-ft).
    4. Tighten the 2 exhaust manifold-to-catalytic converter nuts to 40 N.m (30 lb-ft).
    5. Tighten the 2 catalytic converter-to-muffler exhaust flange nuts to 40 N.m (30 lb-ft).
  15. Inspect the powertrain and exhaust system for contact with the body, frame, suspension components, dash panel, hoses, wire harnesses and other components.
  16. Inspect and, if necessary, reposition the exhaust dampener.
    • The exhaust dampener, located in front of the catalytic converter-to-muffler exhaust flange, should be 114 mm (4.48 in) forward of the exhaust flange and at an angle of 54 degrees from horizontal or between 10:30 and 11:00 o'clock when viewed from the rear of the vehicle.
    • Tighten the exhaust dampener nuts to 47 N.m (35 lb-ft).
    Fig 3: Locating Exhaust Dampener In Front Of The Catalytic Converter-To-Muffler Exhaust Flange
    G03272066Courtesy of FORD MOTOR CO.
    Fig 4: Identifying Exhaust Dampener Indexing Postition
    G03272067Courtesy of FORD MOTOR CO.
  17. Start the engine and inspect for exhaust system leaks.
  18. Road test the vehicle to confirm that the condition is improved.
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