GM Service Manual Online
For 1990-2009 cars only

Groaning Noise in Forward and Reverse

Inspect

Causes

Rear axle lubricant

Low lubricant level contamination

Noise Changes on Different Type Road

Inspect

Causes

Wheels and tires

Imbalance or improper inflation

Noise Town Lowered with Speed

Inspect

Causes

Wheels and tires

Imbalance or improper inflation

Clunk/Knock on Rough Road

Inspect

Causes

Rear axle shafts

Excessive end play

Clunk Noise Accelrate/Deccelerate

Inspect

Causes

Pinion shaft or pinion bearings

Wear or damage

Differential case side gear hub

Worn, oversized or damaged

Universal joints

Wear or damage

Continuous Low Whir or Scrape

Inspect

Causes

Pinion Bearings

Wear or damage

Knock/Click Two Rev Rear Wheels

Inspect

Causes

Rear axle shaft bearings

Lubricant level wear or damage

Noise Most Pronounced on Turns

Inspect

Causes

Differential side gears and pinion gears

Wear or damage

Excessive backlash

Noise Same in Drive or Coast

Checks

Causes

Wheels or tires

Imbalance or improper inflation

Front wheel bearings

Wear or damage

Propeller shaft

Excessive drive line angle

Drive, Coast or Float Noise

Inspect

Causes

Ring and pinion gears

    • Incorrect backlash
    • Incorrect pinion depth
    • Wear or damage