CONTENTS
RUMBLING NOISE
ROARING NOISE UNDERNEATH CARHUMMING SOUND UNDERNEATH CAR
CONDITION(S)
- CONSTANT WHIRRING OR HUMMING SOUND WHETHER ACCELERATING, DECELERATING OR COASTING
- ON REAR WHEEL DRIVE CARS, SOURCE IS UNDER REAR PASSENGER SEATS
- ON FRONT WHEEL DRIVE CARS, NOISE COMES FROM UNDER DRIVER'S SEAT
- SOUND INCREASES ON ACCELERATION OR TURNS AND BECOMES A GROWL OR WHINE
POTENTIAL CAUSE(S)
CHECK THESE FIRST:
1. WORN CARRIER PINION GEAR OR BEARINGS
Have carrier pinion gear or bearings professionally replaced.2. WORN REAR AXLE BEARING (REAR-WHEEL DRIVE)
Have rear axle bearing professionally replaced.CHECK THESE NEXT:
3. WORN HALF SHAFT
Have half shaft professionally replaced.4. BUMPY OR DEEP TIRE TREAD
No action needed.CHECK THESE LAST:
5. INCORRECT CARRIER PINION GEAR AND RING GEAR LASH
Have carrier pinion gear and ring gear lash professionally adjusted.6. LOOSE REAR WHEEL LUG NUTS
Tighten rear wheel lug nuts to recommended specification.
Replace wheel if damaged.
CONTENTS RUMBLING NOISE ROARING NOISE UNDERNEATH CAR