For 1990-2009 cars

#### 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