Noise Conditions

Drive Link Noise: A whine or growl that increases or fades with engine RPM. This noise is most noticeable under a light throttle acceleration, or in Park or Neutral with the car stationary.

Final Drive Nose: A hum related to car speed. This noise is most noticeable under a light throttle acceleration or zero throttle coastdown.

Planetary Gear Noise: A whine related to car speed. This noise is most noticeable in First gear, Second gear, Fourth gear, or Reverse. The condition becomes less noticeable after an upshift.

Pump Noise: A high pitched whine that increases with engine RPM and may be affected by modulated line pressure boost.

Torque Converter: A whine usually noticed when a vehicle is stopped and the transmission is in DRIVE or REVERSE. The noise will increase with the engine RPM. Refer to Torque Converter Evaluation for further information.

Transmission Abbreviations

PCM: Powertrain Control Module

TCC Sol. Valve: Torque Converter Clutch Solenoid Valve

TP Sensor: Throttle Position Sensor

ECT Sensor: Engine Coolant Temperature Sensor

VSS Assy: Vehicle Speed Sensor Assembly

NC: Normally Closed

NO: Normally Open

WOT: Wide Open throttle

RPM: Revolutions Per Minute

PM: Permanent Magnet

A/C: Air Conditioning

MAP: Manifold Absolute Pressure

AC: Alternating Current

DC: Direct Current

MIL: Malfunction Indicator Light

DTC: Diagnostic Trouble Code

OBD: On Board Diagnostic

DLC: Diagnostic Link Connector

EGR: Exhaust Gas Recirculation

MPH: Mile Per Hour

Km/h: Kilometer Per Hour