NVH Forward or Reverse

WARNING: This page is about a different car, the 2010 Ford Pickup, 2010 Ford F550 Super Duty, 2010 Ford F450 Super Duty, and 2010 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: NVH symptoms should be identified using the diagnostic tools that are available. For a list of these tools, an explanation of their uses and a glossary of common terms, refer to NOISE, VIBRATION & HARSHNESS . Since it is possible any one of multiple systems may be the cause of a symptom, it may be necessary to use a process of elimination type of diagnostic approach to pinpoint the responsible system. If this is not the causal system for the symptom, refer back to NOISE, VIBRATION & HARSHNESS for the next likely system and continue diagnosis.

DIAGNOSTIC ROUTINES - NVH FORWARD AND REVERSE

Possible Component	Reference/Action
257 - ROUTINE
Powertrain Control System
PCM (gasoline engines), Transmission Control Module (TCM) (diesel engines), vehicle wiring harnesses, Power Take-Off (PTO) assembly	Carry out On-Board Diagnostic (OBD) tests. Refer to the INTRODUCTION - GASOLINE MODELS for diagnosis and testing of the PCM. Repair as required. Clear the DTCs, road test and rerun OBD test.
Transmission Fluid
Incorrect level	Check transmission fluid level and adjust as necessary. Refer to PRELIMINARY INSPECTION .
Condition	Carry out Transmission Fluid Condition Check. Refer to PRELIMINARY INSPECTION .
Partially blocked internal or external filter	Inspect the filters, clean or install new filters as necessary.
Partially blocked internal filter	Inspect the filter, clean or install a new filter as necessary.
Incorrect clutch apply pressure	Carry out Line Pressure Test. Refer to SPECIAL TESTING PROCEDURES . Repair or install new components as necessary.
Selector Lever Cable
Cable system damaged, misaligned, grounding out	Inspect and repair as necessary. Refer to AUTOMATIC TRANSAXLE/TRANSMISSION EXTERNAL CONTROLS .
Fluid Pump Assembly
Bolts not tightened to specification	Tighten to specification.
Gasket damaged	Inspect for damage. If damaged, install a new gasket.
Porosity, cross leaks, cup plug missing, plugged hole gears cracked or seized	Inspect for damage. If damaged, repair as necessary.
One-Way Clutch (OWC)
Worn, damaged or assembled incorrectly	Inspect for damage. Repair as necessary.
Other
Transmission fluid cooling tubes, transmission fluid fill tube grounding, driveshaft damaged	Relocate transmission fluid cooling tubes or transmission fluid fill tube correctly. Inspect for damage. Repair as necessary.
Inspection cover loose	Tighten to specifications.
Gears
Gear noise	Inspect for damage. Repair as necessary.
Main Control Solenoids or Valves
Worn or damaged main control solenoids or valves	Using a scan tool, activate the solenoids to duplicate the sound. Repair as necessary.
Torque Converter Assembly
Flexplate, torque converter assembly damaged	Remove the transmission. Inspect for damage. Refer to TORQUE CONVERTER CONTAMINATION INSPECTION . If the torque converter fails to pass the criteria for replacement or is damaged, install a new or remanufactured torque converter.
Transmission Insulator and Retainer
Transmission insulator and retainer bound or grounding out	Inspect the insulator and retainer. Neutralize the powertrain mounts. Refer to NOISE, VIBRATION & HARSHNESS .
Transmission insulator and retainer broken or fasteners loose	Install a new insulator and retainer as necessary. Tighten to specification. Refer to TRANSMISSION INSULATOR AND RETAINER .