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Symptom Chart-Transmission (Manual) and Transfer Case Noise/Vibration

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.
SYMPTOM CHART-TRANSMISSION (MANUAL) AND TRANSFER CASE NOISE/VIBRATION

Condition Possible Sources Action
  • Clutch rattling noise-occurs with clutch engaged, noise changes/disappears with clutch pedal depressed
  • Flywheel bolts, clutch housing bolts or clutch pressure plate bolts loose.
  • TIGHTEN the bolts to specifications. CHECK the bolts for damage.
  • Clutch squeaking noise-noise is heard when the clutch is operated. Vehicle moves slowly or creeps when the clutch is disengaged. Can also be difficult to shift into first and reverse gear
  • Pilot bearing seized or damaged.
  • INSTALL a new pilot bearing. REFER to CLUTCH .
  • Clutch squeaking noise-occurs with clutch pedal depressed/released
  • Worn clutch pedal shaft or bushings.
  • INSPECT the clutch pedal for wear or damage. REPAIR as necessary. REFER to CLUTCH CONTROLS .
  • Clutch whirring/rattle noise-occurs when clutch pedal is depressed
  • Worn, damaged or misaligned clutch release bearing.
  • Clutch grating/grinding noise-occurs when clutch pedal is depressed
  • Clutch pressure plate fingers bent or worn.
  • INSPECT the clutch pressure plate release fingers. INSTALL a new pressure plate as necessary. REFER to CLUTCH .
  • Contact surface of clutch release bearing worn or damaged.
  • Clutch chatter-a small amount of noise when clutch pedal is released at initial take-off
  • Clutch engagement.
  • Acceptable operating condition.
  • Clutch chatter/grabs-in some cases a shudder is felt. Occurs with clutch pedal depressed/released
  • Damaged or worn powertrain/driveline mounts.
  • INSPECT the powertrain/drivetrain mounts. Refer to the appropriate ENGINE article. INSTALL new mounts as necessary.
  • Binding or dragging plunger of the clutch master cylinder or slave cylinder.
  • CHECK the master and slave cylinder operation. INSPECT the components for damage or wear. INSTALL a new master or slave cylinder as necessary. REFER to CLUTCH CONTROLS .
  • Grease or oil on the clutch disc facing.
  • CHECK the input shaft seal and rear main oil seal. REPAIR as necessary. INSTALL a new clutch disc. REFER to CLUTCH .
  • Clutch disc surface glazed or damaged.
  • INSPECT the clutch disc surface for a glazed, hardened or damage condition. CARRY OUT a disc check. INSTALL a new clutch disc as necessary. REFER to CLUTCH .
  • Damaged or worn clutch pressure plate.
  • INSPECT the clutch pressure plate for wear or damage. INSTALL a new clutch pressure plate as necessary. REFER to CLUTCH .
  • Flywheel surface damaged or glazed.
  • Clutch chatter noise-noise when clutch pedal is released at initial takeoff. Clutch is hard to engage and disengage
  • Pilot bearing worn, damaged or not correctly aligned in bore.
  • INSPECT the clutch pressure plate release fingers for uneven wear, clutch components burnt or a seized pilot bearing. INSTALL a new pilot bearing as necessary. REFER to CLUTCH .
  • Clutch vibration
  • Loose flywheel bolts.
  • Damaged or loose clutch pressure plate.
  • Excessive flywheel runout.
  • Transmission rattling/clattering noise-noise at idle or on light acceleration from a stop. Gear selection difficult
  • Gearshift lever joint worn or damaged.
  • Gearshift lever loose.
  • Gearshift linkage rods worn or damaged.
  • CHECK the linkage bushings for wear. INSTALL new linkage rods as necessary.
  • Transmission rattling/clattering noise-occurs in neutral or in gear, at idle
  • Incorrect fluid level or fluid quality.
  • Transmission rattling/clattering noise-noise at idle in neutral
  • Worn or rough reverse idler gear.
  • Rough running engine, cylinder misfire.
  • Excessive backlash in gears
  • Worn countershaft gears.
  • Transmission whine-a mild whine at extreme speeds or high RPM
  • Rotating gears/geartrain.
  • Acceptable noise.
  • Transmission whine-a high pitched whine, also described as a squeal
  • Transmission gears are worn (high mileage vehicle).
  • Mismatched gear sets.
  • Damaged or worn transmission bearing.
  • Transmission growling/humming-noise occurs in the forward gears. The noise is more prominent when the gear is loaded. The problem gear can be located as the noise occurs in a specific gear position
  • Gear is cracked, chipped or rough.
  • Transmission hissing-noise in neutral or in forward gears. As bearings wear or break up, the noise changes to a thumping noise
  • Damaged or worn bearings.
  • Transmission knocking/thudding-noise at low speeds in forward gears
  • Bearings with damaged balls or rollers or with pitted and spalled races.
  • Transmission rumble/growl-noise at higher speeds in forward gears, more pronounced in a coast/deceleration condition
  • Incorrect driveline angle.
  • Driveshaft out of balance or damaged.
  • CHECK the driveshaft for damage, missing balance weights or undercoating. Using the vibration analyzer (VA), CHECK the driveshaft balance. CARRY OUT a driveline vibration test. For additional information, REFER to DRIVELINE SYSTEM-GENERAL INFORMATION . REPAIR as necessary.
  • Transmission rumble/growl-noise at all speeds in forward gears, more pronounced in a heavy acceleration condition
  • Damaged or worn transmission bearing or gears (high mileage vehicles).
  • Transfer case whine-noise at all ranges
  • Incorrect fluid level or fluid quality.
  • Worn oil pump.
  • DISASSEMBLE the transfer case. CHECK the oil pump for wear or damage. REPAIR as necessary.
  • Under-inflated or oversized tires.
  • CONFIRM that the tires and wheels are correct for the vehicle. CHECK that the tire inflation pressures are correct.
  • Transfer case growl/rumble-noise at all ranges (A small amount of planetary noise can be heard when the transfer case is operated in low range.)
  • Damaged or worn bearings or planetary gear.
  • Transfer case scraping/grating-noise at all ranges
  • Excessively stretched drive chain hitting the case.
  • Transfer case howl/hum-noise at all ranges or high range only
  • Worn or damaged sun (input) gear, clutch pack (intermediate) gear or output shaft gear.
  • Transfer case howl/hum-noise at low range only
  • Worn or damaged intermediate gear and sliding gears (clutch pack).
  • Transfer case vibration-vibration felt with vehicle in 4WD
  • Transfer case mounting.
  • Driveshaft out of balance.
  • Excessive pinion flange runout.